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Asks: Mozart Valery.
Essence of the question: on the cold start, and Renault Logan does not start on the hot.
Bought Logan from the former owner, a car from Phase 1. The mileage is small, but lately the defect has been manifested: when you start "on the cold" everything works, but with a "hot start" the motor does not start. It turns out, it is necessary to wait 5-6 minutes, until the engine cools. The starter twists, but the motor "does not pick up". Previously, this was not.
Nevertheless, why my Renault Logan does not start, as it should?
Main reasons
The reason for the defect specified in the question may be one - a faulty DPT sensor. This sensor itself will need to be replaced, but you can first spend one check.
Cooling fluid temperature sensor
The Following Two Tabs Change Content Below.
I own Renault Megan 2 car, before that there were Citroen and Peugeot. I work in the service zone of the dealership center, so I know the device of the car "from and to". You can always contact me for advice.
So, we will model the problem situation:
- We start "on the cold", heating the motor;
- It is necessary to achieve that the motor stops start. Wait 5 minutes at the same time;
- If the engine cannot be started, open the hood and turn off the Dzhtoh sensor. Immediately try to start.
Conclusions: If the motor at "step 3" started again, it means that the reason is in a faulty sensor. Further comments are superfluous.
Another probable reason
Connector that delivers problems
Turn off the connector when the ignition is turned off. Do not forget to collect everything, as it was.
The B8 line in the R212 connector is associated with the ignition lock. When it breaks it, the starter will work, but the engine start is blocked.
Consider the reasons when Renault Logan does not start "on the cold". They look trite:
- Overlook or discharged battery;
- Water got into the tank;
- Faulty fuel pump;
- Etc.
But there is another reason characteristic only for the Logan family.
Defect program of the ECU on the engine with Euro-3
If the engine complies with Euro-3 standards, it means that the controller of the ECU may need to replace the firmware. At one time was reviewed, but not everyone responded to Renault request.
The only "letter of happiness" from Renault
Sedany Logan, who are subject to review, were produced from December 2007 to accurate before restyling. We are talking about the transition to "Phase 2" (to the norms of Euro-4).
Doesn't Renault Logan? Check the DRP sensor - an example on video
The situation when the starter actively spins the crankshaft, but the Renault Logan engine does not start, it is capable of leading even the most optimistic driver. Sometimes the search for the cause of the malfunction occupy more than one hour and take a lot of strength and nerves. To reduce this time, you need to navigate in typical breakdowns and know their search algorithm. Today, the conversation will go about what can serve as the reasons for which 8-valve 1.6 and 1.4 Motors Renault Logan, Largus, Sandero.
The main reasons and ways to eliminate them
Cause 1. Disturbed idling
In some cases, the violation of the idle speed adjustment leads to the fact that during the start of the engine, the fuel mixture does not flow into the cylinders. The electronic fault is simply diagnosed simply. If the problem is in this node, it is enough to click on the accelerator pedal and open the throttle - the engine immediately becomes possible. Solving the problem is the cleaning of the idle regulator. 
Cause 2. The crankshaft position sensor is defective (DPKV)
(DPKV) sends pulses to the electronic engine control unit (ECU). In the future, the microprocessor interprets them into signals that control power systems, ignition, etc. Therefore, the breakdown of the crankshaft sensor can be detected not only to the direct replacement, but also by indirect features associated with the lack of voltage on the key nodes of the DVS.
How to check the crankshaft position sensor
In order to test the health of the crankshaft sensor, check the presence of a spark. To do this, it is removed from any cylinder with a tip and attach to a deliberately good candle. Its housing is connected to the "mass" of the car, after which they scroll the crankshaft with the starter. The lack of spark is not direct evidence of the DPKV breakdown - in addition, it is necessary to check whether the power supply to the fuel pump comes.
Fuel inspection on the fuel pump
To access the fuel pump, move the rear seat Renault Logan and raise the gas tank hatch - the plastic latches are held, which are easily pressed with a score or other flat object. Next, you should remove the block from the fuel pump connector and to its black and brown wire (two others are responsible for the readings of the fuel level sensor) Connect the test 12-volt light bulb.
Measure voltage by multiMMetter is not recommended due to the fact that its testimony will not allow the current strength and power consumption. After turning on the ignition, the test lamp should light up literally for a few seconds. This will give confidence that the fuel pump enters the power supply, and it properly performs the primary spraying of fuel in the fuel ramp.
If after the light does not light up (further fuel supply is not carried out), then in combination with the lack of spark, this fact is a direct evidence of the DPKV breakdown, which is the reason for which the 8-valve engine Renault Logan, Sandero, Largus is caused.
Cause 3. Fuel pump malfunction
Among the reasons why the fuel mixture does not come to the cylinders, in the first place there are faults associated with the fuel pump. Next, we will tell you how to diagnose the efficiency of the fuel pump itself and check the health of the electrical part.
Basonasos failed
Getting access to the top of the fuel pump, clean all surfaces from dust with a brush or compressed air. Remove the fuel-powered fitting (in the photo it is indicated by the arrow) and remove it along with the hose to the side.
Check if the fuel swap produces a pump, very simple. To do this, a thin tube is connected to the outlet nozzle of the pump, the second end of which is lowered into a small container. It is enough for a few seconds to turn the ignition key and turn the engine to the starter to make sure whether the fuel enters the highway. And, nevertheless, even if it does not happen, do not make hasty conclusions - it is possible that the pump does not receive 12. How to check the electrical part, has already mentioned above. If everything is in order with the supply of power, then you can safely change the pump turbine - with a large probability, the reason for the breakdown lies in it.
No food on the fuel pump connector
If, as a result of checking the fuel pump, it was found that it does not receive power on its connector, then first check the fuse. The fusible element is on the left side (along the car) of the windscarette, in the safety block. In the supply chain of the fuel pump of 8-valve engines of volume 1.4 and 1.6 Renault Logan, Largus, Sandero and other similar cars, a fusible element is used, calculated for the current strength of 25 A - its location in the block is indicated in the photo of the arrow.
The burning of the fuse by 99% indicates problems with the fuel pump, although it is impossible to exclude the possibility of a short circuit of its positive wire on the "mass". Check the last simple - enough when the connector is removed from the pump insert a good fuse. If the warning lamp caught fire, then you can proceed to dismantling and replacing the pump. Otherwise, you should call the wires of its power supply and eliminate the short circuit.
If during the survey of the fuse, it was revealed that it remained as integer, then it should be checked if "plus" from the onboard network of the car comes to its contacts. In addition, check the operation of the relay that is responsible for switching the power of the fuel pump.
For this, the device circled on the top photo is made of block, and the jumper is installed in its place. The latter closures connectors that meet the power contacts of the switching element. The appearance of nutrition on the terminals of the pump indicates the health of the chain. Otherwise, you need to make sure that the switch itself and the presence of the control signal on its contacts.
To find out if the control voltage is received on the relay, check the presence of a constant "plus" on the appropriate terminal in the block of fuses block and is diagnosed, whether the control "minus" comes onto the shoe.
Keep in mind that "-12V" appears on the relay input contact only when the engine is running, so it should not only turn on the ignition, but also turn the engine starter. If the lamp connected to the "minus" controller and the plus terminal has not caught fire, then the reason can be both a trimmed wire to the control unit and problems with the ECU itself, immobilizer, etc.
Something useful for you:
Problems with wiring
The situation when voltage does not appear on the fuel pump even when the power terminals are brought into the relay block, it occurs quite often. Of course, the only thing that can be assumed in this case is a wiring cliff along the path from the engine compartment to the fuel tank. However, not everything is so unequivocal. The fact is that the developers of Logan or Sandero in the construction laid a weak link in the form of a connector, which is located under the carpet of the salon right at the left rack.
In a dry environment, all its contacts are in a normal state, so there are no problems with wiring. However, the location of the connection is so unsuccessful that with the moisture time (and it penetrates into the salon anyway) makes his black business and contacts are oxidized. Of course, in this case, it is impossible to guarantee the efficiency of individual nodes (including the fuel pump), which leads to an invasion of the power unit.
To access the ill-part connector, it is necessary to remove the cover of the left side rack and raise the carpet. After that, you should separate the block and check the presence of the voltage at the extreme lower output, which is specified in the photo of the arrow - it is responsible for the positive wire.
If there is a signal, it is enough to clean the contacts so that the power of the fuel pump is recovered. If this does not happen, you should look for a chain breakdown from the side of the tank. In the case when the voltage does not even reach the connector, it is necessary to call the circuit to the safety unit and eliminate the break on this area.
As you can see, there are a lot of reasons, because of which the Renault Logan engine refuses to start. Of course, we cannot take into account all possible factors and mention every malfunction, but if you act on the scheme proposed above, then with a huge share of the likelihood you can start your Logan or Sandero.
The video of three parts in which is explained in detail and is shown why 8 valve motor on Renault Logan, Sandero or Lada Largus is not launched.
The fuse blocked. Check out the main fuse.
Starter is faulty. Make sure the electrical wires are properly connected to the starter. Make sure the starter relay makes clicks. In this case, the starter or electrical wires are defective.
Faulty starter relay. Check it.
There is no starter switch switch. Contacts could wet, subjected to corrosion or pollution.
Disassemble and clean the switch
An electrical circuit open or a short circuit occurred. Check all the electrical wire connections and the wires themselves to make sure that they are dry, securely fixed and not corrosion. Also make sure that the wires are not damaged and not torn (see electrical circuits).
The main ignition castle is faulty. Replace the lock if it is unfair.
Starter turns, but the engine does not turn
A starter clutch is faulty. Check and replace it or replace it.
Damaged mechanism or starter gear. Check and replace damaged parts.
Starter works, but the engine does not turn (jamble)
The engine jamming can be caused by damage to one or more internal components, the damage could occur due to wear, inappropriate operation or lack of lubricant. The causes of the malfunction can be trapped valves, pushers, camshafts, pistons, crankshaft, rod bearings, gears or gearbox bearings.
No fuel in the fuel tank.
Fuel tank fuel line clogged.
The fuel filter is clogged. Clean or replace the filter.
The fuel pump is faulty. Check it.
No spark or spark too weak
The ignition lock is in the OFF position.
The fuse of the electrical ignition circuit burned.
Battery voltage is too low. Check it and recharge the battery if necessary.
Spark plugs are dirty, worn or faulty.
Ignition Candle Caps or High Voltage Ignition Wires are faulty. Check their condition. Replace the components if they crackled or damaged.
Spark plug caps do not provide appropriate contact. Make sure What caps are set properly on the spark plugs.
Check the control unit.
Ignition coils are faulty. Check the coils.
Short circuit in the ignition system. This is usually caused by the falling water, corrosion, damage to components or wear. Components can be disassembled and cleaned using a special cleaning agent for electrical contacts. If the cleaning did not help, replace the components.
Short closure or damage to the wire on the site between the following components:
ignition lock (or blown fuse of the ignition system); ignition control unit and high-voltage ignition coils; high-voltage ignition coils and spark plugs;
Make sure all electrical connections are clean, dry and securely fixed. Check the systems for damaged and exterior wires.
Low compression in cylinders
Spark plugs are not secured properly. Remove the ignition candles and check their threaded part. Install the ignition candles and tighten them specified in the speed of the tightening torque.
The elements of fastening the head of the cylinder block are not tightened properly. If you think that the head of the cylinder block is not secured properly, there is a chance of damage to the head of the cylinder block and gasket, if the problem does not disappear over a long period of time.
The nuts of the cylinder head mount must be tightened to the torque torque specified in the specification.
Inappropriate valve gap. This means that the valve does not close completely and the compression passes through the valve. Check and adjust the valve gap.
Piston and / or cylinder is worn out. Excessive wear will lead to compression leak through piston rings. Usually this problem is accompanied by wear of piston rings. It is necessary to perform the overhaul of the components of the upper part of the engine.
Worn, piston rings are damaged or weakened. Damaged or stirring piston rings usually indicate problems in the lubrication system or fuel supply, which leads to excessive nagar sediments on the pistons and piston rings. It is necessary to perform the overhaul of the components of the upper part of the engine.
The gap between the piston ring and the groove is too big. This can be caused by excessive wear of the jumpers between grooves of piston rings. It is necessary to replace the pistons.
The cylinder head laying is damaged. If the cylinder head is not secured properly or if there are excessive nagar sediments on the bottom of the piston, the compression in the cylinders will be too high and the cylinder head gasket can flow. Tightening the elements of the fastening of the head of the cylinder block does not always help eliminate the malfunction. Therefore, it is necessary to replace the gasket.
The head of the cylinder block is deformed. Often it is caused by overheating or inappropriate tightening nuts fastening the head of the cylinder block. It is necessary to perform grinding in the workshop or replace the head of the cylinder block.
The valve spring is damaged or weakened. This may be caused by a component fault or wear. Springs must be replaced.
The valve is not suited properly. This can be caused by the deformation of the valve (with a too high engine speed or inappropriate valve adjustment), the valve or seat adjustment, and the accumulation of nagar sediments on the valve seat. Valves must be cleaned and / or replace, as well as perform the maintenance of the saddle, if possible.
The engine stalls after launch
Inappropriate air damper operation. Make sure the air damper passes the complete move.
The ignition system is faulty.
Fuel is contaminated. Fuel can contain contaminants, water or can change its chemical composition if the car has not been used for several months. Drain fuel from the tank.
Unstable engine work at idle
Fault in the operation of the ignition system.
Inappropriate speed of rotation at idle.
Inappropriate composition of the fuel and air mixture.
Fuel is contaminated. The fuel can contain contamination, water or can change its chemical composition if the motorcycle has not been used for several months.
Air filter clogged. Replace the filter element.
Engine runs unstable at idle
Battery voltage is too low. Check and recharge the battery.
Candle is damaged or worn.
Caps or high-voltage spark plug wires are faulty.
The ignition system control unit is defective.
The ignition system coil is faulty.
Inappropriate composition of the fuel and air mixture
The air filter is clogged, not hermetically closed or not installed.
The air filter housing is not sealed. Check for cracks, damage or loosening fastening, replace and repair the damaged component.
Low compression in the cylinders (see above)
Inappropriate acceleration parameters
Motor oil viscosity is too high. The use of motor oil is too high by viscosity can cause damage to the oil pump or lubrication system.
Unstable engine operation or power drop at high speed
Air filter clogged. Clean or replace the filter
Spark plugs are damaged or worn.
Caps or high-voltage wire ignition systems are faulty.
Spark plug caps do not provide good contact
Inappropriate ignition candles: inappropriate type, thermal mode or inappropriate cap shape. Check and install suitable spark plugs.
The ignition system control unit is defective.
Ignition coils are faulty.
Low compression in the cylinders (see Hashe)
Cluster of nagar in the combustion chamber. The use of fuel additives that dissolve the Nagar is the simplest way to eliminate Nagara. Otherwise, the head of the cylinder block will have to be removed and disgrupted.
The use of unsuitable or poor-quality fuel. Old or unsuitable fuel can cause detonation. This will lead to a piston knock. Drain the old fuel and always use the recommended fuel type.
Use of ignition candles with an unsuitable thermal regime. Uncontrolled detonation indicates that you use too hot spark plug. Thus, you will receive the effect of a vibil ignition, which will significantly increase the temperature in the cylinder. Install the spark plugs designed for a suitable thermal mode.
Inappropriate composition of the fuel and air mixture. This can cause an increase in temperature and detonation in the cylinders.
The throttle valve does not open completely. Adjust the throttle.
Clutch slip. This can be caused by looped properly or wornized clutch components.
The ignition timing angle is not installed.
Motor oil viscosity is too high. The use of motor oil inappropriate viscosity class can cause damage to the oil pump or lubrication system.
Brakes are hired. This is usually caused by contacting contaminants to seal the pistons of the brake system or the deformation of the disk or axis. Perform the necessary repair work.
The bandwidth of the fuel pump is not enough. Check the pump.
Engine overheating
The cooling fluid level is too low. Check and, if necessary, draw the coolant liquid.
There is a leak in the cooling system. Check the hoses and radiator of the cooling system for leaks and other damage. Replace or repaired all damaged components.
The thermostat is jammed in an open or closed position. Check and replace it if necessary.
The lid of the expansion tank is faulty. Remove the lid and check it under pressure.
Channels of the cooling system are clogged. Drain the cooling fluid from the cooling system and rinse it, then fuel the cooling system with fresh coolant.
Water pump is faulty. Remove the pump and check the components.
Radiator channels are clogged.
The cooling system fan or switch is faulty.
Inappropriate ignition installation phases (see)
Inappropriate composition of the fuel and air mixture (see Hashe)
Compression in cylinders is too high
Cluster of nagar in the combustion chamber.
Inappropriate processing of the head of the cylinder block or installing inappropriate gasket when assembling the engine.
Clutch slip. This can be caused by damaged, loose properly or worn clutch components.
Motor oil level is too high. An increase in the level of engine oil can cause an increase in pressure in the crankcase and inefficient engine operation. Check the specifications and drain the engine oil to the required level.
Motor oil viscosity is too high. The use of high-grade engine oil (than recommended in specifications) can cause damage to the oil pump or lubrication system.
Shining brakes. It is usually caused by the falling of foreign particles to seal the pistons of the brake system or the deformation of the disk or axis. Perform the necessary repair work.
Motor oil level is too low. The friction is caused by a constant disadvantage of lubrication or the use of spoiled oil, which can also cause overheating. Engine oil performs the cooling function in the engine. Check the level of engine oil.
Low quality motor oil or inappropriate viscosity class. Oil is classified not only by viscosity, but also by type. Some oils are not high quality for use in the engine.
Modification of the exhaust gas release system. When installing such equipment, you will always pre-consult qualified specialists.
The presence of extraneous noises when operating the engine
The gap between the cylinder and the piston is too big. Most often it is caused by inappropriate assembly. Check and perform the overhaul of the components.
The rod is deformed. This can be caused by a high frequency of rotation, an attempt to start a bustled engine or ingestion of foreign particles into the combustion chamber. Replace damaged components.
Piston finger or a piston finger hole is damaged due to wear or lack of lubrication. Replace damaged components.
Piston rings are worn, damaged or seized. Perform the overhaul of the upper components of the cylinder.
Damage due to piston enclosure. Usually caused by a lack of lubrication or overheating. Honing cylinder sleeves and install new pistons.
The clearance in the upper or bottom of the connecting rod is too big. This can be caused by wear or label disadvantage. Replace the worn components.
Inappropriate valve gap. Adjust the gap.
Valve springs are too weak or damaged. Check and replace valve springs assembly.
The camshaft or head of the cylinder block are worn or damaged. The lack of lubricant at a high speed of rotation is usually the cause of such damage if the oils are not enough or you have not replaced it according to the maintenance schedule.
Other extraneous noises when operating the engine
Leak through the gasket of the head of the cylinder block.
The exhaust pipe flows on the connection with the head of the cylinder block. This may be caused by the inappropriate installation of the pipe or weakening the flange connection. All elements of fastening the exhaust gas release system must be tightened properly. Otherwise, this may cause leakage.
The crankshaft beating is too large. This may be caused by the deformation of the crankshaft (with too high speed frequency) or damage to the top component of the cylinder.
Engine support bolts are not secured properly. Tighten all engine support bolts.
Watch an interesting video on this topic.
Every year, engineers try to improve the designs of engines, in favor of the efficiency and environmental friendliness of these units. Communication with this increases the number of breakdowns associated with the unstable, poor engine operation, up to its complete stop. Renault Logan owners have come across the problem of bad engine launch, as well as its unstable work. Of course, if the engine of your car stalls, the first thing you appeal to the maintenance station. In this article we will talk about the most common faults related to the work of the DVS Renault Logan, as well as consider the methods of eliminating them.
The most common faults
If the motor of your logan is poorly started or completely stalls, the perpetrators can be the following malfunctions:
- Focused fuel pressure regulator.
- Bad spark due to the failure of the high-voltage part, namely candles, coils and wires.
- Incorrect installation of the labels of the gas distribution mechanism, as a result of which the non-chronic operation of the fuel combustion phases occurs.
- The throttle is faulty, adjusting the air flow entering the engine.
- Possible problems with immobilizer, as a rule, the control unit loses communication with the key chip.
- If the motor stalls unexpectedly on the go, it is necessary to check the quality of spraying fuel injectors.
- Another reason that the motor stalls on the go may be a polluted fuel filter.
- If the motor does not start or start and immediately stalls, the breakdown may be associated with the fuel pump.
- If the engine does not start at all or turns poorly and after some time it stalls at an unexpected moment, the culprit can serve the fault of the crankshaft position sensor.
- The wear of the camshaft and its sensor can cause bad start and subsequent engine operation.
Let's wonder some reasons for bad engine work and try to diagnose these breakdowns on their own.
Diagnostics
- If the fuel pressure regulator does not work well, as a rule, it must be changed. To make sure of its malfunction, you need to unscrew the fuel feed hose, and then turn on the ignition. If gasoline is treated from this hose under high pressure, respectively, the regulator does not work. To eliminate a malfunction on the way, it is enough to drown one end, or pick up the return tube, thereby reduce its cross section. By producing such work, you can easily reach the place of repair.
- In the case when the spark is not properly applied to the cylinders, interruptions in the engine work occur. To make sure this node is faulting, you must have a special key to unscrewing the candles. Having twisted the candle, you need to connect them to the tips of high-voltage wires and scroll through the starter several times. If the spark goes to the side or its strength is missing, this node needs to be replaced. As a rule, a car with such a breakdown can get to the place of repair independently.
Attention! Observe the safety regulations when do such work. The high-voltage part of the car is very dangerous for life and health.
- If the Tags of the Thame distribution phases are not installed incorrectly, the engine works with essential interruptions with characteristic cotton.
This malfunction cannot be eliminated, without having due equipment and tools. If this malfunction has entered you on the road, do not try to fix it yourself. Tow car to the nearest car service and only there are repairs.
- If the flap is faulty, adjusting the air flow, there are several ways to reveal this breakdown, and eliminate it. Unscrew the air supply system nozzle and inspect the throttle for integrity.
With a plugged engine, its position should be in the closed state. If this does not happen, this node must be cleared, after which make adaptation using computer equipment. As practice shows, this malfunction appears gradually and simply may not be on the road. Accordingly, such a repair must be done on a specialized service station.
- If the engine of your Logan starts and after some time immediately stalls, pay attention to the dashboard, namely, on the subject of the reference lamp of the immemobilizer display. If this test lamp flashes, respectively, the immobilizer block lost contact with the key chip. You can continue the movement, only using another spare key instead of the old one.
With the help of special equipment, the key used can be prescribed to the immobilizer block program, but it is done on special equipment.
Tip: Take a spare key if you go to the long road.
- You can check the operation of fuel injectors only on an equipped stand, respectively, this repair is produced by specialists.
- If a fuel filter has been hampered in the car, of course, this item must be replaced. In case this situation has entered you on the road and the engine stalls, there are some recommendations for detecting and eliminating this fault.
- Open the hood, then remove the fuel supply hose and turn on the ignition. If gasoline comes under low pressure, respectively, the filter has a bad bandwidth.
- To increase the bandwidth of the fuel filter, it must be removed and thoroughly blow up in the opposite direction.
- Remove the fuel filter from the latch and make some operations to clean the dirt from its enclosure. You can use a thin screwdriver and break through the paper item through.
- Install the filter into place, then run the engine if the motor started and running smoothly, follow the nearest car service where you need to replace the filter element.
- If suddenly the engine of your car suddenly stalled and does not start, you need to check the health of the fuel pump.
To identify fuel pump malfunction, it is necessary to open the hood and dismantle the gasoline supply hose. At this point, you need to turn the key to 2 position, thereby closer to the gas station relay.
If gasoline does not come, respectively, the fuel pump does not work well and has become unusable. We cannot give any recommendations for its emergency repair, since this unit changes assembled with the case. In such a situation, the car must be towed to the nearest service, where repair will be repaired.
- If the problem is related to the operation of the crankshaft position sensor, diagnose and eliminate this fault, without having special equipment, it is impossible.
Repair must be carried out only in a specialized service.
- Diagnostics and repair of problems associated with the wear of the camshaft, as well as its sensor, is carried out only in the service to repair the engines.
Conclusion
This turned out a brief overview of Renault Logan faults. If the motor of your Renault Logan stalls and does not start, use our article as instructions for identifying faults. We hope our material will be useful for you.
In pursuit of the economy and environmental indicators of motors, engineers annually take a lot of efforts to improve these aggregates. This necessity determines the increase in the number of faults caused by unstable work or unauthorized stopping engine. Renault Logan owners are familiar with the problem of difficult launch. If the unit rangs, the first thought that you who came to you is to immediately go to the service. Often the most common problem is when the motor car does not start on the cold, many car owners immediately arises the question, and what reasons?
Here we will look at the most common emerging breakdowns in the engine work on Renault Logan and give methods to eliminate them. And the most basic, it is necessary to understand the reasons why the engine does not start, especially on the cold.
What malfunctions are most common?
If the Renault Logan engine is hardly started, it does not start or constantly stalls, then among the main causes of this breakdown can be the following:
- the fuel pressure regulator is in a faulty state;
- poor development of sparks due to failures in the functioning of candles or coils;
- incorrect installation of gas distribution labels, which causes the lack of synchronous operation of the fuel ignition phases;
- violations in the work of the throttle valve controlling the volume supplied to the inlet air collector;
- possible output of the immobilizer due to the frequent cases of losses by the feedback control unit with a key chip;
- if the engine is inclined to stall on the go, you should check the nozzles for the quality of the flare spraying;
- another reason for stopping the motor can be pollution of the fuel filter;
- the bad launch of the unit or its stop immediately after the start testify to ineffective work or output of the gas station;
- if the motor started, but after some time it stopped functioning, a faulty crankshaft sensor may cause the culprit;
- also, the wear camshaft or its sensor can provoke a motor on an unstable start and unstable operation.
Now we will proceed to the change of the reasons for the unstable engine function and try to diagnose the malfunction itself.
Diagnostic features
- When the pressure regulator appeared failures, it is subject to replacement. To confirm its faulty state, disconnect the fuel reverse current hose and subsequently turn on the ignition. If the fuel under pressure will immediately begin from this hose, this is a direct evidence of the regulator fault. To eliminate the breakdown on the road, drowned its edge or take the tube, which will reduce the sections. By completing these manipulations, you can get to get to the repair station.
- If there is no full-fledged spark, it causes interruptions in the operation of the motor. To exclude this aspect from suspected, it is necessary to use a special candlestone. Having unscrewing the candles, connect them to the tips of high-voltage ignition distribution cables and scroll the starter to several revolutions. If the spark discharge is not enough, the node is subject to replacement. With such a malfunction, the car is able to arrive at the repair site without outside.
- Attention! In the works of such a character, compliance with the requirements of the Security Rules - compulsory condition for the fulfillment! High voltage voltage is very detrimental to health!
- Improper installation of labels on gas distribution phases provokes a motor to significant revolutions. The fact is accompanied by specific cotton. The malfunction cannot be eliminated without resorting to the use of specialized equipment. If the breakdown was covered on the road, then the personnel attempts to eliminate it are contraindicated. It is recommended to tow the car to the service where it will be provided by a qualified technical machine.
- With incorrect work of the damper controlling the air flow, the breakage is diagnosed by several methods. After checking, it should be proceeded to troubleshoot. To do this, we unscrew the feed air pipe and inspect the inner surface of the housing and the damper itself for the absence of its damage, as well as the production on the walls.
- On a fixed motor, it is in a closed position. If the impossibility of complete closing is noted, the node needs cleaning. After that, the valve will have a computer adaptation. In practice, it is confirmed that the appearance of a malfunction is increasing. The sharp appearance on the way is impossible. It is recommended to perform the appropriate list of repair activities in a specialized workshop and in advance, at the first symptoms of deviation in operation.
- When, after starting and short-term work, the motor immediately stalls, pay attention to the behavior of the immobilizer lamp, located on the dashboard. When it is blinking, you can classify the specified node to the cause of the fault. This is usually due to the loss of an electrical communication immobilizer unit with a chip located in the key. Resume movement will be able only after changing the faulty key to the spare analogue.
Special equipment, which is available in the arsenal of specialized services, allows you to produce a "registration" key of the block software. - Tip: With long journeys, we recommend that you have a spare key with you.
- Checking the performance of fuel injectors is diagnosed with a special stand. This procedure should also be entrusted to specialists.
- When the fuel filter clogged, it must be replaced. When an unpleasant malfunction appears on the road when the motor seeks to stall, we recommend using the recommendations to eliminate the defect below.
- Open the Renault Logan hood and dismantle the fuel supply hose, then turn on the ignition. If the fuel flow is carried out under low pressure, the filter began to show insufficient bandwidth.
- To increase this ability, dismantle the filter element and blow it in the direction opposite to the normal fuel feed mode. Also follow the maximum to clean the filter. To do this, use a screwdriver or a suitable thin object required for exposure to paper liner.
- Install the filter to your former place and run the Renault Logan motor. If the unit does not stall, and its turns do not "float" or not "jump", go to the nearest service to replace the unsuitable element.
- With a sudden motor stop, we check the performance of the pump of fuel supplies. To this end, we open the hood and remove the fuel supply hose. At the same moment, turn the key to the "2" position, which initiates the inclusion of the pump relay.
When the flow of gasoline is not detected, the pump is faulty. In this case, to give certain recommendations for temporary troubleshooting is not possible. The only measure is towing auto Renault Logan to the nearest workshop. - If the cause of the cause of the malfunction was the failure of the crankshaft sensor, the elimination of this breakdown on the road in the absence of special equipment is also impossible.
- It happens that the engine does not start at all in particular on the cold, in this case it is advisable to contact the specialists in the service center.
Performance of repair activities in the Renault Logan car is carried out in this case only in the conditions of a specialized service. - Diagnostics and repair work due to wear of the camshaft or its Renault Logan sensor when the motor does not start, running in the service based on the repair of motors.
In custody
In the article, we led a short list of faults arising from Renault Logan motors. This material is recommended to be applied as an instruction that allows you to define the designated breakdowns. We hope for the usefulness of our article.
