C5 1.8 2003 Hatchback Petrol - Engine Running After Key Removed

[wpeter]

Hello,

 

I've been having this problem for months where the engine continues running after the key is removed.

The battery light is the only light that remains on when the key is removed....no other warning lights are on when running or stopped.

Everything is running as normal, although it did go into limp mode last week for no apparent reason and I've noticed the occasional 'dip' in accelaration when driving.

I've tried changing the ignition barrel, rebooting the BSI, and also changed the under bonnet fusebox in case it was a stuck relay, but no success.

This problem only started after I ran out of petrol one time. From that moment on, the engine wont switch off with the key. Any suggestions for a solution would be gratefully received.

 

Cheers

  

[paul.h]

How many miles has it done ?

For it to continue running needs a fuel supply (maybe a fuel shut off valve is not closing but the injectors would need to work unless they are leaking) and an ignition source - if the electrics are switched off this could be a carbon build up.

 

Maybe you could unplug the ignition barrel when it should be switched off to see if the engine stops.

[wpeter]

Thanks for the reply.

It's done 99,180 miles.

I've used the Redex additive lately in case of a carbon build up....no improvement though.

I've never actually left it running with the key out to see if it stops itself eventually. That may give a clue so I'll try that now and post back.

I'm sure it's linked to when I ran out of petrol though....maybe a stuck solenoid somewhere?

 

Cheers 

[wpeter]

I just left it running with the key out and gave up after ten minutes .... it just kept running.

[paul.h]

When you replaced the ignition barrel, was it the electric switch you replaced or the lock, just thinking there may be play in the lock so the switch is not being fully turned off.

 

http://www.honestjohn.co.uk/forum/post/index.htm?t=57401

[wpeter]

I replace the whole barrel, so I've ended up with a different key for the ignition and doors/petrol cap.

[coastline taxis]

did you replace the bsi unit as there all linked

[coastline taxis]

did you replace the bsi unit if you did have you coded it all in together  as it sounds like the signal from the key isnt being recieved by the bsi unit

[wpeter]

No,I just replaced the complete ignition barrel with a second hand one complete with key, thinking the original may have been worn.

The chip that matched the bsi was in the hinge of the plastic key fob, so I simply pulled the key blade out of the replacement key, and glued it into in my original plastic fob, and also swapped the circuit board for the central locking.

The car starts and runs normally (although I now have to carry the original key for the petrol cap or in case I need to manually unlock the doors). 

[wpeter]

So, the symptoms are exactly the same with a different barrel and key, and a different under bonnet fuse box, and with the BSI being reset.