Engine Problems

[pshht]

Well driving home last night my exhaust manifold gasket shit itself near the rear of the engine (firewall). It drove fine for a while but after turning the car off then back on the engine would not idle at all without me holding the throttle about half open. If i let the throttle off it would drop from 100 revs upto 500 but it was struggling to idle basically. I have a power fc and i noticed timing was 20 degrees on idle, and from memory i think it usually sits on 15 degrees, not sure if this is related though..

Anyone have any suggestions to this problem?

Right now im going to replace the exhaust manifold gasket and try to find out whats going on..

Cheers

[pshht]

Ok well ive replaced the exhaust manifold gasket and the turbo gasket while i was at it but its still playing up. Ive swapped between the standard ecu and the power fc but this makes no difference. It sounds as if the engine is running without the AFM plugged in but that isnt the problem. When the car is idling it sounds as if it is maybe not firing in one cylinder or something along those lines. If someone could give me some suggestions that would be good..

Cheers

Ben

[pshht]

And i noticed that this time around the power fc said ignition timing at idle was 24 derees

[pshht]

anyone?

Im going to replace the O2 sensor today as this may be contributing to the problem but i doubt it would be the main factor..

basically its running like its in limp mode its similar to when my AFM was unplugged.

also its running quite rich and blowing alot of smoke

any help would be appreciated

Edited September 13, 2006 by pshht

[blind_elk]

It won't be the O2 sensor - save your money.

If it's not running on one cylinder, have you determined which cylinder? Disconnect each coil until no difference is found. Then move that coil to another cylinder and test again. If it is now on the new location, then it's the coil, if it's with the original cylinder, then it's a plug.

It doesn't matter what the PFC says the timing is; it is what a timing light says that's important.