What to do if the engine does not stop after you turn off the ignition

The motor continues to run after the ignition is turned off – what does this mean

Modern motors of vehicles provide a – mechanism consisting of many parts and mechanisms, each of which needs to be properly adjusted, as well as adjusted.

The engine runs after the ignition is turned off

A fairly common problem among car owners is the continuation of the main engine – the “heart” of the vehicle, after turning off the ignition detonation, glow ignition or dithering. As a rule, this problem is caused by serious engine failures, which require the fastest possible solution.

To understand why this happens, let’s break down in this article.

Causes of detonation of the engine after turning off the ignition

The duration of engine operation for a few more seconds after the ignition is turned off indicates that there is clearly a problem in the car. As a rule, the duration of detonation is 2-3, in some cases it can last up to 15 seconds.

So, if the engine does not stall after turning off the ignition, the reasons:

Filling up the car

  1. Using fuel of improper quality or not the brand prescribed by the factory. Gasoline differs from each other with different octane numbers. That is, if the factory recommends pouring A-95, then it is necessary to pour it (forgetting all thoughts about economy, looking askance at cheaper A-92). As the proverb says: “a miser pays twice”.
  2. One more reason – failure of certain spare parts of the engine (read more in detail below).
  3. Too early ignition (this is a special type of adjustment, which affects the sensitivity of the engine to the gas pedal). It is performed in order to improve the speed characteristics of the car. But in most cases, it ends with detonation.
  4. Overheating of the engine.
  5. Use of inappropriate plugs.

Dizeling and glow ignition

Both CC and dithering – they are similar to each other – both in the first and in the second cases, the engine does not shut down immediately after turning off the ignition.

However, gasoline engine dithering is different from a CC and can occur as a consequence:

  • When the compression ratio of the motor is increased;
  • When low-octane fuel is used.

Dueling ignition – the air-fuel system continues to work on its own, which is caused by contact with glow plugs or other red-hot elements of the fuel system. Dizeling is also a self ignition of gasoline. But in this case, the work of the motor after its complete shutdown and removal of the keys from the ignition, is affected by the level of compression, and already after that – the red-hot surfaces.

Calculation ignition

Note that compared to detonation, glow ignition is less harmful. But, as mentioned above, it can ignite in inadmissible places, which leads to melting of plugs, overheating of pistons and so on.

In the event that the “heart” of the car works “unevenly” after the ignition is turned off, it is definitely not a glow ignition. The CA has one peculiarity – the engine works in any case without twitching.

In the case of dithering, the engine will twitch a lot and run unevenly.

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It is worth saying that dithering is a problem that is more common in cars with high compression engines. Also, this problem can occur when the cooling system malfunctions.

Important: Older power units with a somewhat low compression and compression, as a rule, are not subject to dithering.

It is also worth adding that most modern engines work on the principle: switching off the ignition – complete abolition of the fuel supply. If, however, a new vehicle will “twitch” after a complete shutdown, then there is a possibility of problems in certain areas of its power supply. Also one of the possible causes is the breakdown of the interlocking systems.

How to eliminate detonation

Before you begin to eliminate this problem, it is necessary to determine its “source”, as well as to find the causes that have produced it.

So, if the “heart” of the car began to detonate immediately after refueling, it means that you poured low-quality fuel into the tank. If you own a gasoline vehicle, add some acetone to the tank – such actions will increase the octane number and allow the engine to work properly, or drain the fuel and refuel with a higher quality.

When transporting the car with minimum loads and in the most sparing conditions, or when the engine is idling for a long time, fouling is formed in the combustion chambers, which increases the compression level and thereby increases the risk of detonation.

To avoid such problems it is necessary to take care of prevention, namely: to strain the engine – work in difficult conditions and under heavy loads – dynamic acceleration, high revolutions, the pressure of the gas pedal to the floor. It is also recommended to drive at lower speeds.

The driver behind the wheel

Detonation of diesel engines is often accompanied by greenish or completely black exhaust. Why is it so? It means that the pistons are out of order, and aluminum particles get to the exhaust gases. In this case, the way out will be a complete replacement of the piston group.

So, in order to prevent your vehicle from such occurrences, it is necessary to carry out maintenance regularly and thoroughly! It is also not necessary to save money on fuel – we repeat “a miser pays twice”. It is better to do it qualitatively and reliably once, than to overpay later!

What to do if the engine does not stop after you turn off the ignition

nissan cefiro wagon When you turn off the ignition the car does not turn off. Alarm, autostart poke does not help. alarm Starline.

Please do not blame the type search Youzay, etc., they there are not seen. Just asking for a guy’s help…

Re: When I turn the ignition off the car does not stop.

Message The Good Cat ” Tue Jun 12, 2012 4:22 pm

The art of really swearing comes only with the ability to drive! Boardwheel: Nissan Maxima 2004 2,0 meh Good Eh (Infiniti EX35)

If your car’s engine doesn’t “want” to stall, you should check the power relay, idle sensor, ignition and spark plugs. Using high quality fuel can also help with this, but will not solve the problem completely.

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Potassium ignition prophylaxis and remedies

If you find signs on your engine that are characteristic of the occurrence of potassium ignition, it is necessary to take action, most likely it will be an overhaul. When carrying out repairs, you should replace the parts that have used up their resource, in the course of operation. As a rule, these are oil caps and piston rings.

The work itself requires a certain skill and knowledge, so it should be carried out by qualified specialists.

Repair of the engine, the process is long, costly and time-consuming, all components of the process depend on the degree of wear of parts and mechanisms. With its proper passage will be eliminated such a dangerous phenomenon as potassium ignition, the power plant will begin to work quietly, steadily, without extraneous noise and signs of detonation.

Preventive measures to eliminate potassium mixture ignition include:

  • Selection of spark plugs, based on the powertrain manufacturer’s recommendations, with the correct potassium number, and the correct base length;
  • Timely and proper preventive maintenance and servicing of the powertrain cooling system. Constant maintenance of the cooling jacket capacity, keeping the sockets clean, using the correct grade of working fluid;
  • Do not overheat the engine during operation, monitor the correct engine temperature in case of overheating, identify and eliminate the causes;
  • To use qualitative fuel, with the necessary octane number, recommended by the producer of the aggregate;
  • Regularly check the correctness of the ignition advance angle setting, and correct it if necessary;
  • Regularly check the ignition advance angle setting, and adjust it if necessary; – Monitor the condition of the piston rings and exhaust valve;
  • Do not overload the engine unnecessarily.

If the engine has been disconnected from the ignition, but is running, it must be stopped immediately. This is done by engaging 2nd or 3rd gear on the alternate gearbox, then releasing the clutch and the unit will stall.

Accurately following the above rules, responsibly approaching the issues of your engine operation, you can significantly extend the life of its operation and avoid big financial problems related to elimination of the consequences of potassium ignition.

Numerous details and systems influence the correct operation of the power unit of a modern car. And if anything starts to malfunction, it will lead to the failure of the engine parts and the engine itself. One of the serious problems for the engine is its detonation and continuing to work after the ignition is turned off. Such a malfunction stumps many motorists, who are not able to understand its cause. And it occurs because of the so-called glow ignition, as a result of which the car does not immediately stall after stopping the engine. This article will help to understand why this happens.

What can be the reason if the engine does not stall after turning off the ignition?

When you turn off the ignition switch, you expect the engine to stop! And you will be very upset if it doesn’t. If the engine continues to run the same way it did before the ignition switch was turned off, as if it hadn’t been turned off at all, then its fuel and ignition systems have not shut off. If this is the case, there are electrical problems in your vehicle that need to be fixed. It is also possible that the ignition switch or power relay needs to be replaced.

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It also happens that the engine cannot stop immediately and begins to run jerkily instead, making a knocking and squeaking sound, also known as “diesel-ignition” or “glow-ignition”. This phenomenon occurs when there is something in the engine combustion chamber that is hot enough to ignite the residual fuel in the engine. The phenomenon is so named because of its similarity to the operation of a diesel, in which fuel is ignited without the use of electrically powered spark plugs. This usually does not happen with modern injector engines, but in the “dark” era of carburetors, drivers often encountered this problem.

Causes of potassium ignition

The main causes of potassium ignition formation:

  • Bad fuel, octane mismatch;
  • Gas distribution systems not working properly;
  • Insufficient cooling of the powertrain by the system;
  • Wrong choice of spark plugs;
  • Overheating of intake valve or piston.
  • Fuel

By using low-quality fuel, the user provokes formation of carbon deposits on valves, combustion chamber area and spark plugs. The octane number that does not correspond to the required one does not allow the gasoline to burn completely, hence the cause of deposits. When the engine is running, it heats up the deposits, heating them to temperatures sufficient to ensure autoignition. That’s why the engine doesn’t stop right away after the ignition is turned off.

Bad fuel clogs the feeding system, including the injectors, which interferes with the atomization process, and gasoline begins to flood the combustion chamber. Excessive gasoline provokes overheating of the engine and individual parts, which further aggravates the situation.

The problem of low-quality fuel can be solved by washing the gas tank, cleaning the injectors, changing the filters and the fuel inlet hoses.

Part 1 of 3: Diagnosing the Electronics

Determine what kind of problem you’re experiencing, whether it’s electrical or diesel related.

  • screwdrivers (Phillips tip and regular slotted);
  • repair manual.

Step 1: Determine what kind of problem you have

When you turn the key, does it feel like you didn’t turn it at all? The engine does not turn off, the dashboard is lit and the parking lights are still on? But the engine is still running smoothly, so you can start speeding and drive off. If so, you have an electrical problem.

But if the engine is knocking and thumping and doesn’t shut off, then go to step 2 in this manual.

If the problem is with the electrical part, you need to get to the inside of it. Remove the bottom half of the plastic steering column cover and find the ignition switch connector underneath. It may be on the back of the switch itself or on the end of the electrical cable coming from the switch, so it will be a little away from the steering column.

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Disconnect the switch connector and then everything should stop. If this is what happened, you will need to replace the ignition switch to solve the problem.

Step 2: Check the power relay

If your car’s engine continues to run after disconnecting the ignition switch, you will need to locate the main fuel and ignition system relay. Your vehicle’s owner’s manual will be a good aid in this endeavor.

In some vehicles, this relay may be called the ECM relay, Digifant relay, or DME relay. Although rare, the vehicle may continue to be supplied with power after the ignition key has been turned off due to the main relay sticking. If the car is finally de-energized after the relay is removed, a working relay must be installed in its place.

Dizeling and glow ignition

Both CC and dithering – they are similar to each other – both in the first and in the second cases, the engine does not shut down immediately after turning off the ignition.

However, gasoline engine dithering is different from a CC and can occur as a consequence:

  • When the compression ratio of the motor is increased;
  • When low-octane fuel is used.

Dueling ignition – the air-fuel system continues to work on its own, which is caused by contact with glow plugs or other red-hot elements of the fuel system. Dizeling is also a self ignition of gasoline. But in this case, the work of the motor after its complete shutdown and removal of the keys from the ignition, is affected by the level of compression, and already after that – the red-hot surfaces.

Note that compared to detonation, glow ignition is less harmful. But, as mentioned above, it can ignite in inadmissible places, which leads to melting of plugs, overheating of pistons and so on.

In the event that the “heart” of the car works “unevenly” after the ignition is turned off, it is definitely not a glow ignition. The CA has one peculiarity – the engine works in any case without twitching.

In the case of dithering, the engine will twitch a lot and run unevenly.

Read also: Characteristics of AutosportTechnica rear disc brakes and Tornado recovery for Lada Priora

It is worth saying that dithering is a problem that is more common in cars with high compression engines. Also, this problem can occur when the cooling system malfunctions.

Important: Older power units with a somewhat low compression and compression, as a rule, are not subject to dithering.

It is also worth adding that most modern engines work on the principle: switching off the ignition – complete abolition of the fuel supply. If, however, a new vehicle will “twitch” after a complete shutdown, then there is a possibility of problems in certain areas of its power supply. Also one of the possible causes is the breakdown of the interlocking systems.

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Part 2 of 3: Diagnosing a “diesel engine” if it doesn’t stall right away.

  • ignition distributor wrench;
  • safety glasses;
  • screwdrivers;
  • spark plug wrench (the right one for your vehicle);
  • your car’s service manual.

Step 1: Carburetor or Injector?

Does your car have a carburetor or fuel injectors? If you don’t already know this, check your car’s owner’s manual.

If your car was built after 1985, it’s probably equipped with fuel injectors. The “dieseling” problem rarely occurs on these cars because fuel delivery to them stops as soon as the switch is turned off. The carburetor, on the other hand, unless specifically equipped for such cases, will provide fuel to the engine as long as air is flowing through it.

Part 3 of 3: Anti-Fouling

  • fuel additives to clean the engine;
  • high-quality fuel.

Step 1: Try engine cleaning additives

If you have tried all of the above steps and still do not get rid of the problem and the engine does not immediately shut down, then your engine probably has serious deposits of carbon deposits.

The fouling can cause increased compression in the engine and form particularly hot spots in the engine combustion chamber, which can subsequently lead to “dithering”. There are now many different additives available on the market designed to clean the engine while it is running.

Following the manufacturer’s instructions, mix the additive with fuel while refueling the vehicle. Then drive out onto an expressway and drive some distance at high speed, accelerating hard several times. The fuel’s cleansing formula can help break down the soot and get it out through the tailpipe.

Step 2: Change the fuel

Using fuel with a higher octane rating can help alleviate the “dithering” problem that you haven’t been able to get rid of through other means. You have to understand that this is not a way to get rid of the problem, but a type of proper engine care.

High-octane fuel is more stable and not as prone to premature ignition from glowing fouling in the engine.

Over time you will realize that it is too expensive to fill up with more expensive fuel. In addition, the first impressive effect of using high-octane fuel will diminish over time. For the final solution of the arisen problem more thorough engine repair is probably required.

Numerous details and systems influence the correct work of the power unit of a modern car. And if anything begins to malfunction, it will lead to the failure of the engine parts and the engine itself. One of the serious problems for the engine is its detonation and continuing to work after the ignition is turned off. Such a malfunction stumps many motorists, who are unable to understand its cause. It occurs because of the so-called glow ignition, as a result of which the car does not immediately stop after stopping the engine. Why this happens, and will help to understand this article.

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