My 89 have very good acceleration in general but when it have been driven like for 1/2 hour or in city traffic which causes the engine to get normally hot,then the acceleration is like down approx. 30%.
I am going to check the o2sensor since that little thing is mentioned a lot.
Could anyone tell me at what temp. the system runs in closed loop.
temp sensor ohm = closed loop ?


Pär Jakobsson
300E 4matic 89 ,240000km