Fuel and Engines
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Ford Ranger XLT

How do you stop the engine from dieseling?

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2015-07-16 19:26:08
2015-07-16 19:26:08

let it cool down a bit before shutting it down,and or tune up. check timing

Your engine may be running too rich. Has your gas mileage gone down?

try using higher octane fuel

There is now straight forward answer for this question, ignition timing,fuel mixture,valve timing,computer prom,and many other factores can contribute to dieseling. A Tech would need more info. to properly diagnose the problem. For example, mileage,type of fuel & ignition system,. I will say that most dieseling can be contributed to poor octane of fuel or timing.

I had the same problem on my old truck. When you shut the engine off it starts dieseling.Check the carburetor and see if the bottom butterflies are shutting all the way, if not try adjusting it or find out why they are not shutting . This is the most common cause of your problem.

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the solution can depend on the year and induction type. usually too high an idle speed and rich idle mixture combine to allow a hot carbon chunk in the cylinder to ignite the mix and cause the dieseling. on injected engine its far less common but leaky injectors have been known to cause the condition also

This condition is called "dieseling" where the engine continues to run on after the ignition key has been turned off. It means that your engine timing is way off ... a complete tune-up of this engine should end this situation.

If the engine continues to run after you have turned the key off you have what was called "Dieseling". Checking the timing and set the idle to factory specs should cure it. Shutting the engine off while stopped in drive will stop the engine for now until you get it looked at.

Engine dieseling Runs too hot or idles to fast Try leaving in gear when shutting off

Check your timing and if it is a carb, check to make sure the air fuel mixture is set properly.

Wrong octane number fuel in your tank or a too high engine temp. Check and correct both immediately.

Several things can cause this phenomenon, called dieseling. Built up carbon in the cylinders, incorrect timing, an overheated engine, a lean carburetor setting, or a fast idle can all be contributors to dieseling.?รฆ

The term for this is called "dieseling" ... nothing to do with a diesel engine, rather it's a timing issue with your cars engine.

Dieseling or "Run-on" occurs when the engine is so hot that the fuel in the engine ignites without the spark plugs firing. On newer cars, like this '92 Honda, there should be an anti-dieseling valve that will turn off the fuel. That might have failed and will need to be replaced. After your engine has cooled, check the coolant level. If the coolant is too low, it can contribute to the engine overheating. If the radiator fan is not running while your car is dieseling you can bank on problems with the cooling system. The '92 accord, I believe, still has a thermostat switch that turns the electric radiator fan on. That could be bad or the fan could be burned out.

It sounds like your engine is "dieseling". It's where a gasoline engine runs after any normal source of ignition is removed. Dieseling is often caused by carbon build up in the cylinder (on the head). After the engine has been run, the carbon stays red hot and continues to ignite the fuel.

This is called "dieseling" and is a bad thing. There are several reasons it might happen, but the short answer is "take it to a mechanic, tell him it's dieseling, and let him figure it out."

It is called dieseling and it is caused by either your motor being hot or there is some fuel vapor left on the inside of your intke.

The problem is called "dieseling" or "engine run-on" and happens primarily in cars with carburetor engines. It occurs when the engine is shut down because fuel in the cylinders is being ignited without a spark, but by a hot spot in the cylinder. The problem isn't as prevalent in cars after 1990, since most are now fuel-injected.There are several things that can cause dieseling - refer to the link below to view them.

If by "stop the engine", you mean turn the car off, then the answer is NO!

There are several ways to force an car engine to stop. One way to force the engine to stop is to disconnect the battery. Another way to force the engine to stop is to turn off the ignition.

There should be a fuel shutoff that needs to be adjusted, but let the car idle a couple of minutes before shutting it off and the valves should cool off enough to not diesel.

When the key is turned off and the engine continues to run normally it is probably an electrical problem like a bad ignition switch. However, if the engine is "dieseling" and the ignition is really off, then the problem may be a buildup of carbon deposits on the tops of the pistons and the head and spark plugs. You might try cleaning or replacing the spark plugs, then use a higher octane gasoline. But to simply stop the dieseling just turn off the ignition with the transmission in 'drive', then shift to 'park' after the engine has stopped turning over. The timing is too far advanced. Take it to a shop and find out why the timing is so far above top dead center.

if the engine is running hot your fuel stopper may be bad and it's doing what is called dieseling or running backwards!

The condition has many names, "run on", "piston glow", "dieseling"... basically, the carbon deposits in the engine are hot enough that once you turn off the engine the heat from the carbon deposits will continue to ignite the fuel, keeping the engine SORT of running. That was one of the many reasons for going to EFI. In an EFI engine, once the key is turned off, the injectors STOP injecting fuel and the engine stops. If your vehicle is EFI, you probably have a leaky injector. If your vehicle has a carburetor, it's "run on", and you might get a little benefit from a tune-up and possibly a carburetor rebuild.

If you mean that the engine continues to sort of run after the ignition is switched off, this is called "dieseling." It's not a good thing, and there are several potential causes. You'd probably need to take it to a mechanic to have it diagnosed and repaired. (If you didn't already know this, it's probably not something you can diagnose and fix yourself.)

Then stop the engine and have it inspected by a professional.

Absolutely never turn off the engine when you are in a driving lane on any roadway. A stop sign means stop, not park.

It could be a serious carbon build-up in the cylinders, which glows hot enough to ignite the fuel even when there is no spark. The only reason the engine stops when you turn the key is that the spark stops. So if something else can ignite the fuel, the engine will run.


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