Hi all my 95 wrx has a missfire about 2 mins after startup and continues until it gets to operating temps. It doesnt do it everytime, maybe 6 out of 10 times.
I have checked the fault codes and its all clear.

Mods, Walbro pump, 1.1 bar chip, full decat.

Thanks.

 

have you checked your coil packs? is it worse when its been damp?

 

I have had the coil packs off and checked for cracks or any other noticable defects. Also changed the plugs. Not really noticed it being worse when damp.

 

bttt