Have had a thought on this , any ECU gurus out there maybe able to help.
The other day I reset the ECU and then went for a drive and found the problem was really bad.
So I was thinking if the problem occours when engine is cold and also when ecu is reset , then the car would be running on the preloaded maps in these states and if a map was corrupt then this could be the cause?
Correct me if im wrong , just assuming things from my limited knowledge.