Just notice recently when I come to a stop at a traffic light that the engine on my 3MPS gen1 revs up slightly. The sequence goes like this:
1. Engine rpm drops to about 1k with foot on brake
2. Depress clutch in while car comes to a complete stop
3. Engine rev rises to 1.5k -2k rpm instead of dropping to idle speed of 800 rpm
4. Engine rev drops to idle speed
This happens when the engine has already warmed up and with the steering straight and not turning.
I initially thought this might be to do with engine assist with power steering and braking but brake fluid and power steering levels are all OK.
Anyone experiencing this ? Could it be from the MAF/O2 sensor? Boost leak somewhere?
I hope this is not the sign of things to come with a turbo car getting past its 100k km age
Car is stock except for 3 third party engine mounts.