How do you stop the engine from dieseling?
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.
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
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…
What makes an older Johnson 60HP motor keep on running after the ignition is off and the spark plug wires disconnecte It also revs up to more than normal RPM's?
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…
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.
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 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.)
What caused my 88 bronco to not shut off could not turn the key to cut it off was finally able to turn the key?
This could have been caused by something called 'Dieseling'.Dieseling is caused when either a) for some reason (injector fault) the fueling system still supplies a small amount of fuel to the engine and this ignites and the cycle goes on... or b) an excess build up of hydrocarbons ignites or glows as a result of heat from the engine and again the cycle goes on... Alternatively, the ignition barrel may have jammed and therefore you…
There are many possibilities. More information is needed. If it's a 70's era car that's dieseling, could be the timing is off, or the anti-dieseling solenoid isn't working. If the car has had an electric fan installed recently, and won't shut off when the fan is running, the fan is not properly wired. If it's a computer controlled car, could be a problem with the ignition switch or ecm.
Probably neither. I'd assume it's a condition called "dieseling" or "run on". If the vehicle is carburated it will continue to draw fuel as long as the engine runs. When an engine gets a little older it builds up deposits on the piston and valves. The deposits get hot, glow red and when the engine is turned off, fuel mixture comes in contact with the glowing deposits and keeps the engine running... sort of.
With a carburetor-ed vehicle it was not uncommon for an engine to continue to run after you have turned the key off. It was called "dieseling". It could be caused by excessive carbon built up in the combustion camber, incorrect ignition timing, idle speed set to high, an overheated engine or all of the above. With the advance of electronic fuel injection that condition doesn't or shouldn't happen anymore.