Why won't the Chevrolet Niva start? ways to solve problems

Electrical reasons

First of all, you need to remove the cap from the spark plug (any one) and install spark plug A17 DVRM. Holding it with pliers, turn on the starter.

To remove the cap, hold the spark plug by the hexagon (pliers with insulated handles are suitable). It is necessary that the spark plug body touches the “ground”. As a result, you will be able to see a spark. In the case where there is no spark, this indicates:

• malfunction of the ECM or lack of voltage;
• combustion of the ignition coil module;
• damage to high-voltage wires.

By the way, a spark “in the air” does not guarantee its presence in the engine. Spark plugs can be faulty, there is a gap violation, etc.

Battery Niva Chevrolet

Due to insufficient battery charge, the starter does not rotate, the flywheel does not spin, and the combustible mixture in the combustion chamber does not ignite. To check the battery charge level, you need to use a multimeter.

Lately it has become popular to buy gel batteries. Instead of the usual electrolyte, the compartments are filled with gel. The service life of batteries of this class is 25% longer than analogues.

And also interesting: Niva crossover or SUV. Advantages of the Chevrolet Niva over other jeeps

The immobilizer blocks engine operation

When the immobilizer is activated, one way or another, it will block the engine from starting. This happens when, with the ignition on, the indicator starts flashing for 15 seconds and then goes out. Next, the system sends sound signals.

It’s time to disable the module on the Chevrolet Niva APS-4. Here you will need a training key (red), but APS-6 cannot be turned off. Basically, the ECM is forced to flash. There is no need to panic: the blocking is probably due to a broken reader in the cable.

A little about the fuel rail

There is a control fitting 3 on the ramp with regulator 5. The latter is hidden by a cap; you need to unscrew it and carefully press the spool. Fuel poured out - therefore, it entered the ramp. However, it is possible that the required pressure is not generated. The reasons may be clogged filter cylinder, damage to the pump, etc.

The pressure must show 350 kPa, that is, 3.5 bar. To control it, unscrew the spool and then install a pressure gauge. On the eve of the test, you should reduce your blood pressure. If there is no fuel supply, you need to pay attention to whether the pump turns on or not when turning the key to the “I” mark. When cold, the pump should operate for 10 seconds with the engine running.

Note: What happens when there is water in gasoline? In the summer - nothing. But in winter, the food system sometimes becomes clogged with ice.

Fuel supply filter

There is always a small amount of moisture in the fuel. When this amount is increased, this is what can happen:

• the first start always goes without problems;
• After leaving the car in the parking lot, after 2-3 hours the driver will no longer be able to start the engine without repairs.

Everything mentioned should be attributed to the injection internal combustion engine. And here the fuel filter will be a candidate for failure. So, in the Chevrolet Niva it is located under the bottom in aluminum form. By the way, this is thought out on many machines.

Pumping up excess air

As you know, a Chevrolet engine sometimes does not want to spin because too much air is drawn into the intake manifold. Therefore, it is worth checking the fixation of all pipes and more.

The cause of excess air is damaged VUT. The engine on a Chevrolet Niva does not start while the starter is turning, which means you need to look for the problem in the brake system. But you can do it simpler:

• remove the vacuum supply hose (from the amplifier side);
• close the hose gap with your finger by performing a test run;
• the engine starts, which means the problem has been found.

Despite its apparent simplicity, damage to the air supply is difficult to see. It is worth checking how the hoses are seated on the fittings and making sure the clamps are tight.

Damage to the starting system

Failure may manifest itself in improper operation of the starter device. Let us highlight 5 main malfunctions of this mechanism:

1. The starter does not turn. The reason lies in a violation of the contact units, a break or short circuit in the starter circuit, or damage to the traction relay.
2. When starting the starter on a Chevrolet Niva, there are repeated clicks. This indicates a malfunction of the traction relay, which is held by the winding, a discharge of the battery, or loose contact connections in the starter circuit.
3. The starter starts, but the armature either does not rotate or rotates slowly. The cause may be a discharged battery, broken contact connections, burnt contacts of the traction relay, worn brushes, dirty commutator, interturn/short circuit of the windings.
4. The starter turns on, the armature rotates, but the flywheel does not move. The problem may be loosening of the starter to the clutch housing, breakage of the flywheel teeth or drive gear. This would also include slipping of the freewheel of the drive and damage to the lever.
5. The starter does not turn off after starting the Chevrolet Niva engine. The reason is a malfunction of the freewheel of the starter device, sintering of the contacts of the traction relay. If this damage occurs, stop the engine immediately.

How to troubleshoot problems on a Niva Chevrolet

Regardless of the type of breakdown or the availability of technical equipment maintenance skills, use the services of a service station, where they provide a quality guarantee for the work performed.

Independent intervention in repairs does not always bring positive results. Use the services of handicraft workshops less often.

Electrical faults

1. First of all, for all types and models of cars, you should pay attention to the battery - it can be worn out or simply discharged.
2. The starter has become wet or has become unusable.
3. The terminals may have oxidized, resulting in poor battery contact.
4. Malfunctions are often due to defects in spark plugs, which occur when using low-quality fuel. Also, the spark plugs could simply wear out, forming a large gap.
5. Another reason is a blown fuse.
6. Broken ignition relay.
7. It is possible that the wire supplying the starter or injector has been torn off.
8. The immobilizer is not working.

Reasons why Chevrolet Niva doesn't start well

To troubleshoot a car problem, you first need to find out the source why the car won’t start. The driver can be helped in identifying damage by various sensors on the instrument panel, an external inspection of the car, or the sound that is made when the key is turned. So, the main problems that cause the engine to start poorly and the car will not start may be the following malfunctions.

Causes of electrical damage:

1. The car battery has become unusable or discharged. This basis is primary for all types of cars.
2. The starter became unusable due to getting wet, or, as they say, it served its purpose.
3. Poor contact from the battery due to oxidation of the terminals.
4. Defective spark plugs, which could occur in the following cases:
   Poor quality fuel, which led to them getting wet.
5. The spark plugs have already worn out and a large gap has formed.
6. The fuse has blown.
7. The ignition relay or something else has failed.
8. The wire supplying the main components of the car (for example, power supply to the starter or injector) has come off.
9. The immobilizer does not work. If for any reason the anti-theft system does not work, the car will not be able to start until the immobilizer malfunction problem is resolved.

Mechanical faults:

1. There is no fuel in the gas tank. This may not only be the fault of the driver, because there is a possibility of a breakdown of the fuel level sensor. Not every driver counts fuel by the number of kilometers driven.
2. Clogging of the fuel filter or fuel pump, which leads to breakdown of the latter.
3. Nozzle clogged.
4. Insufficient oil level in the engine or antifreeze in the radiator. Causes the engine to overheat.
5. The idle speed control is damaged.

How to find out the cause of the problem

Knowing the most common sources for which the Chevrolet Niva does not start well, now you need to find out how to correctly determine the damage? After all, there are many reasons, and it will take a considerable amount of time to check all this. Finding out the reason why your iron horse does not want to work is done with the help of your eyes, ears and car tips. You can call a technician to your home, who will determine the damage in a matter of minutes, and sometimes even seconds. And for this clarification, you will have to pay a lot of money. You can take your car to a service station by asking a friend to help with transportation. It will cost much less than calling a technician to your home, but you will spend a lot of time. Therefore, your best bet for determining damage is you and your head. Only if all possible reasons have been verified, then it is necessary to contact a specialist. Perhaps your car requires a major check of the entire system.

Finding out the cause of breakdowns

If you want your Chevrolet Niva to start, you must determine the problem. You can do this yourself or take it to a mechanic. But the second option requires serious financial investments. The best option, without significant investment of time and hard earned money, is to try to determine for yourself the reason why your car refuses to start. If you are unable to figure out the damage to your car on your own, you will have to contact a specialist.

When you turn the key, you can diagnose battery problems. If the panel, as they say, is silent, then you need to charge the battery. Recharging does not take much time, a few hours is enough. Perhaps the battery has already failed, then it needs to be replaced with a new one.

The cause of the malfunction is the starter. It can only be stated if there are no problems with the battery panel. It happens that you turn the key, the starter clicks, but does not start. Experts say that in this case the battery does not conduct the required amount of current to start the engine. To make sure there are problems with the starter, you need to measure the current and voltage with a volt and ammeter.

Sometimes problems with a car arise due to problems with the battery contacts. They can be detected by lifting the hood and visually assessing the level of oxidation. Unfortunately, car owners cannot always do this, due to the presence of rubber pads on the terminals.

If you suspect the source of the problem is the spark plugs, remove them from the cylinder and carefully inspect them. If they have black deposits on them and are wet, this indicates they are damaged. Dark brown is a normal candle color.

Reasons why Chevrolet Niva doesn't start well

Causes the engine to overheat. The idle speed control is damaged. After all, there are many reasons, and it will take a considerable amount of time to check all this. Finding out the reason why your iron horse does not want to work is done with the help of your eyes, ears and car tips.

You can call a technician to your home, who will determine the damage in a matter of minutes, and sometimes even seconds. And for this clarification, you will have to pay a lot of money. You can take your car to a service station by asking a friend to help with transportation. It will cost much less than calling a specialist to your home, but you will spend a lot of time.

Therefore, your best bet for determining damage is you and your head. Only if all possible reasons have been verified, then it is necessary to contact a specialist.

Perhaps your car requires a major check of the entire system. Knowing all the shortcomings why the Niva does not respond to turning the key in the ignition, you can easily identify them: You can determine if the battery is damaged by checking the presence of power in the car when you turn the key.

If at this moment the entire panel, as they say, is silent, then you need to charge the battery or replace it with a new one. Recharging may take a couple of hours if the battery is in good condition, but if the electrolyte density is low, then you only need to purchase a new battery. We can talk about failure of the starter to perform its function if it is definitely determined that the battery is in good working order. It is possible that when you turn the key, the starter will click but will not start.

In this case, this also indicates that the battery does not provide the current necessary to start the engine. Damage to the contacts on the battery can be detected by opening the hood and visually assessing their oxidation. Often, drivers simply do not notice oxidation due to the rubber lining on the terminals. Spark plugs can be checked by unscrewing them from the cylinder block and performing a visual inspection.

You start it right away for the second time and it works without problems and warms up. There were no problems while driving, although a couple of times it seemed like there were dips during acceleration. I switched from RN to Lukoil, this problem disappeared: My father went to the dacha and couldn’t start it there, I wanted to take the help of the club, but a neighbor helped, they looked at all the spark plugs and they turned out to be damp. We screwed in the spare set and it started and drove fine. And since Sunday, when warming up, the speed varies from to and the warmed-up engine periodically stalls at idle, it needs a carb.

Maybe it will resolve on its own or should I add some chemicals? Who successfully cleaned the power supply system with chemicals? You need to unscrew it, blow it out and clean it. When the engine is not running, when the ignition is on, if you disconnect the wiring from it, it should click.

When the channels or jets become heavily clogged, at least go to maximum and it won’t blow out. Well, as a varinat, there is such garbage as carburetor cleaner in spray bottles. It does not help for long and harms the carb, as it washes away the lubricant along with harmful deposits. Although, in a desperate situation, I sometimes used such garbage. I haven't cleaned it yet.

The effect did not last long. Replacing the carb solved all the problems. I also had the jet in my carb replaced with a larger one. The dynamics, of course, have worsened, but the efficiency has increased. On the highway, consumption at average speed reached 8.5 liters per hundred. I poured the exact amount of gasoline into the empty tank, set the odometer to 0, and then counted.

Kostya understands, it means we need to blow all the dirt out of the carb more often! And this is the first time this has happened with gasoline, on the RN on P.

Why the Chevrolet Niva does not start: the starter turns, but the engine does not catch

It happens that the starter works fine, but the engine stubbornly refuses to start, although the Check lamp does not light up. In such cases, if we talk about the VAZ-2123 engine, we can immediately name 10 different reasons. All of them will be quite real, and not at all from the category of “contacts have oxidized.” In general, sometimes the Chevrolet Niva does not start, but the starter turns the shaft properly, and the reason should not be looked for there. Well, let's try to learn to recognize different reasons, that is, to distinguish one from the other.

Example in the video: the APS immobilizer blocked the engine because it was in learning mode!

Spark plugs Niva Chevrolet

Unstable spark plug operation and untimely spark supply contribute to engine detonation. First signs:

• Reduced acceleration dynamics;
• Increased fuel consumption;
• The engine is not running properly;
• Difficulty starting the engine.

Also interesting: Engine tuning: Niva 4x4 - increasing power using common methods
Since spark plugs are a disposable consumable, they cannot be prevented.

The engine does not start in the cold - the first sign of failure of the spark plugs. When in good condition, candles heat the space from the inside. In the event of a breakdown, starting the engine is complicated by low temperatures and the formation of condensation.

We check the spark plugs with a multimeter and replace them with new ones as necessary. We also inspect the spark plug start relay. It should make a slight clicking sound.

The method described above is effective for the injector. In the case of a carburetor, the checking mechanism is as follows:

• open the hood, wait until the engine cools down to a safe temperature;
• remove the cradles one by one, unscrew the spark plugs, check them for a spark;
• install new spark plugs, replace them if defective ones are found;
• assembly in reverse order.

Chevrolet Niva does not start: three different sensors

The crankshaft position sensor will not indicate its failure in any way. The Check light will not light up, the engine will simply not start. Finding this sensor is easy if you know where the alternator belt is (see photo).

DPKV sensor connector

Here we check the serviceability of the wiring, as well as the distance from the sensor to the “teeth” (0.8-1.2 mm).

The second suspicious element will be the temperature sensor. The engine may not start only if it breaks. In this case, the electric fan should work without turning off. That is, a break in the DTOZH sensor circuit is easily recognized.

Element “6” is DTOZH

In the photo there is a sensor, and to get to it, the air duct is removed.

If the idle speed control malfunctions, the engine on a Chevrolet Niva does not start, but the starter turns. By the way, the Check lamp may be on. Diagnostics:

1. Just lightly press the gas and turn on the starter;
2. If the engine starts, but without gas it does not start, it means the IAC is faulty.

Chevrolet Niva starts and immediately stalls: when cold, reasons

The Chevrolet Niva received an injection engine that was progressive for those times, and with it a whole list of injection problems. The fact is that any engine with an injection power system is controlled 90% by electronics - sensors, controllers, processors. And these elements require a very high-quality elementary base, fine tuning and special care during assembly. If a Chevrolet Niva starts and stalls when cold, there is a possibility that the control electronics system has failed.

Chevrolet Niva starts and stalls when cold, what should I do?

Perhaps the reason should be looked under the hood?

After a long period of parking, the engine starts, runs for a few seconds, and then stalls. There may be several reasons for such a malfunction, but let’s imagine that the diagnostic station is 300 km away from us, and we need to find the cause. We proceed as follows.

Looking at the candles

When using spark plugs with cracks, current leaks through the insulator to the spark plug body.

We unscrew the spark plugs and assess their condition.

If the spark plugs are flooded or wet, then there is a possibility that the idle speed sensor did not turn on, the throttle unit sent the wrong signal to the ECU, which in turn sent too much fuel through the injectors.

In addition, a common culprit for a malfunction with such symptoms is the throttle position sensor. With a high degree of probability, the spark plugs could fail.

Listening to the fuel pump

Niva Chevrolet fuel pump under the seat.

Turn on the ignition and listen to see if the fuel pump is working.

There is a possibility that fuel is not supplied to the ramp, and the engine flared only due to the remaining gasoline in the fuel line.

If this version is confirmed, then the engine will no longer start, the fuel pump needs to be repaired, the fine filter or mesh, or the coarse filter on the fuel pump itself must be replaced.

Looking for an air leak

You should look for air leaks under the hood.

Air leaks in the power system can also cause a similar malfunction. A mixture that is too lean at startup will prevent the engine from running after a flash.

To verify this in field or garage conditions, just cover the air intake pipe of the air filter.

Often, air leaks can occur between the filter housing and the throttle assembly; sometimes excess air can enter through the junction of the intake manifold and the block head.

Cleaning the XX regulator

Old idle air control on a Niva Chevrolet.

Idle speed regulator. Considering the quality of our 92 gasoline, dirty IAC is not that uncommon.

If, after trying to start again, the car starts, but the speed fluctuates within the range of 1500–2000 rpm, you can safely remove the idle speed control, clean it or change it.

The regulator will also manifest itself in motion, when the car is coasting, the engine may stall or stall frequently, there may be no idle speed at all if the regulator is faulty or completely coked.

We control the MAF (Mass Air Flow Sensor)

Checking the operation of the mass air flow sensor.

For reference, at idle speed the Niva Chevrolet engine consumes about 17–19 kg of air, at 3 thousand revolutions - about 35 kg.

If the mass air flow sensor sends incorrect data to the electronic engine control unit, then the fuel supply changes accordingly, according to the data of this sensor. For example, a faulty mass air flow sensor sends data about 40 kg of air at idle, the ECU adjusts the fuel supply, as a result of which we again have flooded spark plugs and the engine refuses to work after starting without a throttle valve.

One of the most obvious symptoms of air flow meter failure is increased fuel consumption, whether at idle, at medium speeds, or under load.

conclusions

These are not all the reasons that can lead to the fact that the Chevrolet Niva starts up and immediately stalls when cold, these are only what we are able to check on our own.

Ideally, the car is taken to a good diagnostician; only with the use of professional equipment can the cause of the incorrect operation of the electronics be 100% determined. Happy launches to everyone in any weather and good luck on the road!

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Set of "electrical" reasons

The first step in diagnostics: remove the cap from any spark plug, install spark plug A17DVRM and, holding it with pliers, turn on the starter.

How to remove the cap

The spark plug must be held by the hexagon, the pliers must have insulated handles, and the spark plug body must touch the “ground”. As a result, a spark can be observed. If there is no spark, it means:

• The ECM is faulty or is not receiving voltage;
• The ignition coil module burned out;
• High voltage wires are faulty.

The drawing for point “1” is given below.

Power supply point to the ECM

The presence of a spark “in the air” does not guarantee its presence in the engine. The spark plugs may be faulty, the gap may be incorrect, etc.

The number of reasons why the Chevrolet Niva does not start, but the starter turns, has increased to 7.

Immobilizer blocks engine starting

If the immobilizer has been activated, then sooner or later it will block the engine from starting. It happens like this: when you turn on the ignition, the indicator flashes for 15 seconds, then goes out. And then the system produces sound signals.

“2” – immobilizer lamp

The APS-4 module can be disabled. For this you need a “red” training key. Well, the APS-6 unit cannot be turned off. Usually you have to flash the ECM.

There is no need to panic right away: perhaps the blocking occurs due to irregularities in the “reader” wiring.

Chevrolet Niva starts and stalls when cold, what should I do?

Perhaps the reason should be looked under the hood?

After a long period of parking, the engine starts, runs for a few seconds, and then stalls. There may be several reasons for such a malfunction, but let’s imagine that the diagnostic station is 300 km away from us, and we need to find the cause. We proceed as follows.

Looking at the candles

When using spark plugs with cracks, current leaks through the insulator to the spark plug body.

Unscrew the spark plugs

and assess their condition.

In addition, a common culprit for a malfunction with such symptoms is the throttle position sensor. With a high probability .

Listening to the fuel pump

Turn on the ignition and listen

, .

If this version is confirmed, then it is necessary to repair the fuel pump, replace the fine filter or mesh, or the coarse filter on the fuel pump itself.

Looking for an air leak

You should look for air leaks under the hood.

Air leak

in the power system can also cause a similar malfunction. A mixture that is too lean at startup will prevent the engine from running after a flash.

Often, air leaks can occur between the filter housing and the throttle assembly; sometimes excess air can enter through the junction of the intake manifold and the block head.

Cleaning the XX regulator

Idle speed control

. Considering the quality of ours, dirty IACs are not that uncommon.

The regulator will also show itself in motion, when the car coasts or stalls frequently; there may be no idle speed at all if the regulator is faulty or completely coked.

We control the MAF (Mass Air Flow Sensor)

Checking the operation of the mass air flow sensor.

For reference, at idle speed the Niva Chevrolet engine consumes about 17–19 kg of air

, at 3 thousand revolutions - about 35 kg

.

If the mass air flow sensor sends incorrect data to the electronic engine control unit, then the fuel supply changes accordingly, according to the data of this sensor. For example, a faulty mass air flow sensor sends data about 40 kg

air at idle, the ECU adjusts the fuel supply, as a result of which we again have flooded spark plugs and the engine refuses to work after starting without the throttle.

Fuel rail

On the ramp next to regulator 5 there is a control fitting 3. It is closed with a cap, which is unscrewed and then carefully pressed on the spool.

If fuel flows, it means it is entering the ramp. But perhaps the necessary pressure is not created. Reasons: clogged filter cylinder, pump malfunction, etc.

The pressure should be 350 kPa (3.5 bar). It is controlled by unscrewing the spool and installing a pressure gauge. Before checking, you need to reduce the pressure!

If fuel does not flow, notice whether the pump turns on when the key is turned to the “I” mark. When the ignition is turned on “cold”, the pump should run for 10 seconds.