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87 Posts
For the most part the car accelerates very smoothly except for two instances:
1/ from dead stop it occassionally stumbles at 1500 rpm. I've actually had the car stall once from this (on rail road tracks at that!). If I do a slow clutch slip start with revs above 1500 it doesn't stumble at all. But doing that all the time would affect clutch lifespan negatively...
2/ At WOT (wide open throttle) it will start to stumble around 5000 rpm - almost like the rev limiter kicking in early. If I ease up on the pedal just slightly it goes away.
I'm thinking it might have something to do with the TPS or idle/WOT switches?
(I'm not sure which variant our cars use for the Motronic).
I've checked for vacuum leaks, includeing the MAf to plenum boot and everything seems fine.
Car is a 91 S.
1/ from dead stop it occassionally stumbles at 1500 rpm. I've actually had the car stall once from this (on rail road tracks at that!). If I do a slow clutch slip start with revs above 1500 it doesn't stumble at all. But doing that all the time would affect clutch lifespan negatively...
2/ At WOT (wide open throttle) it will start to stumble around 5000 rpm - almost like the rev limiter kicking in early. If I ease up on the pedal just slightly it goes away.
I'm thinking it might have something to do with the TPS or idle/WOT switches?
(I'm not sure which variant our cars use for the Motronic).
I've checked for vacuum leaks, includeing the MAf to plenum boot and everything seems fine.
Car is a 91 S.