Engine runs on after taking keys out!

[Hermen]

Mornin,

Has anyone encountered the problem of switching off your ignition, taking the keys out of the ignition and the engine continues to idle? Very strange. I have to stall the engine to stop it. I have a 1.6td JX engine and as far as I can see, the problem is called pre-ignition or over run.

Anyone ever encountered or have any ideas as to a solution

Cheers

[andisnewsyncro]

I discovered a while back that I can remove my keys with the engine running. Are you sure you're turning it right off

[Hermen]

Ha Ha. Yes I turned the key all the way to the off position.

[ELVIS]

If not worn ignition barrel have you checked fuel stop solenoid on pump ?

Near where the metal lines exit back of pump-will have a 12v feed to it.

Pull off wire to check its not a wiring issue (ie staying live) and also leave wire connected but listen for solenoid click when key is turned to ignition live (but not trying to fire engine) - obviously need a helper for this!!

[superhotrod45]

Can also be called PINKING, can be caused due to timing out, crap petrol etc, be worth getting it tuned up, used to have that on a capri, would run for ages then gasp and stop.

[Oldiebut goodie]

Shouldn't be any petrol in a diesel engine.

[kevtherev]

Can also be called PINKING, can be caused due to timing out, crap petrol etc, be worth getting it tuned up, used to have that on a capri, would run for ages then gasp and stop.

[Ian Hulley]

It's a d****l thing ... sounds like despite the pump being switched off (with the key) it's running on on either engine oil that's leaking into the system or d****l leaking in from somewhere.

I'm not a d****l guy but that's what happens on plant.

Ian

[BOXY]

I think its a diesel not a petrol? Maybe its dieseling?

"Dieseling is so-named because it is similar in appearance to how diesel engines operate - by firing without a spark. The ignition source in a diesel is the compression of the fuel in the cylinder rather than a spark as in gasoline engines. The dieseling phenomenon occurs not because the compression ratio is sufficient enough to cause auto-ignition of the fuel, but a hot spot inside the cylinder starts combustion. An automobile engine that is dieseling will typically sputter then gradually stop."

[Red Westie]

Faulty diesel shut off solenoid...

http://www.ehow.com/how-does_5016171_di ... -work.html" onclick="window.open(this.href);return false;

Martin

[Hermen]

Thanks for all your responses....I ended concluding that there is a carbon deposit build up which continued to burn ( yeh, like I should know!) I just got a bottle of stuff that cleans injectors,valves and pistons. Problem solved after adding to tank and a little run. Cheers

[hairyuk]

well if it was running on carbon deposit build ups.
i'd start it up then switch it off and drive round on that.
should increasse your fuel economy by 99%

[peasant]

I ended concluding that there is a carbon deposit build up which continued to burn ( yeh, like I should know!) I just got a bottle of stuff that cleans injectors,valves and pistons. Problem solved after adding to tank and a little run.

I call shennanigans on that one.

A diesel engine does not run on carbon build-ups, it either runs on oil or diesel.
If it were running on oil (from a broken turbo for example) it would also run ungoverned, meaning it wouldn't just idle but try to rev its nuts off.
So that only leaves diesel (through the normal supply). As yours kept on running it either had a faulty shut off valve, a faulty ignition barrel or some bad connections between the two. As it miraclously fixed itself now, my guess would be dodgy wiring/connections on their way out. It's working for now, but most likely the problem will re-appear.