my bmw 318i diesels when shutting down have had it a dealer many times with no solution to concern

Sorry Clarence your problem is unclear more information needed

Dave

I think i can translate for him -

He has a petrol 318i and the engine continues running after switching the ignition off for a several seconds, a condition known as "dieseling" since the fuel is igniting without a spark. 

This should be impossible on an engine with electronic fuel injection unless you have a fairly major issue with the engine burning oil. 

Morning

Thanks Eric I understood what Clarence meant, what is needed is more information. His post gives nothing but the engine type and that the car is 4 years old? Nothing on how long has it been happening? How long has he owned the car?

Dieseling in petrol cars is normally caused by timing issues and/or something hot and glowing in the cylinder/cylinders to keep it firing without ignition. Has it covered as many miles as the Starship Enterprise and has carbon buildup which glows hot? is there some cylinder head damage or valve damage (more likely culprit if low miles). Modern petrol engines run lean so a check of the fuel system needs to be carried out to ensure it isn't over fueling, normally this would smell this around the car and in the exhaust. Is it overheating.

The poster says it has been back to the Dealer many times, when he says Dealer is it just a car sales place selling all marques where he brought it or a BMW Dealer? If it is a BMW Dealer I would be finding a different one for a proper diagnosis.

So back to my original post more information Clarence for us to get our collective heads around your problem.

Dave

Hi Dave, yes, everything I said was a complete wild guess without having more info, and more information is required to do anything beyond wild conjecture. I wasn't saying that more info isn't needed, I was just trying to guess at what he was trying to say.

Morning Eric

Has the Snow meted yet? I did wonder if Clarence's car was one that had suffered a stretched timing chain and the Dealer was ducking any warranty responsibility ??

Dave