Spinning like a cat
Join Date: Sep 2011
Slight hickup when cracking throttle open
My 2.0 TS -97 (ph1, M2.10.4 ECU) tends to show a small hiccup when going from no throttle to just putting my foot on the pedal. Typically this is noticeable in slow traffic and around 2000 RPM. When just pressing the pedal I feel a small jerk, and somewhat oscillation after that. This is only noticeable when engine is at work temperature, not on a cold engine. The car runs perfectly apart from this. Service is done as it should. New plugs, newly cleaned throttle housing. Idle valve also inspected and ultrasonic cleaned. Cam belt changed last year and cam timing properly adjusted with cam locks..
Should I continue in my search after something being wrong, or could this be a mapping problem? A Green Cotton air filter is fitted, so could it be that that car is running somewhat lean, since I don't see this when the car is cold and mixture probably is richer?