Hi.My E28 M5 has developed the following problem...Starts up first time and runs perfectly when cold,but when it gets upto running temperature,from idling to about 2K revs it runs lumpy,(overfueling possibly?)
The AFM was replaced 2 years ago,today i replaced the blue temp sender on the water pipe above the exhaust manifold.
If anyones got any advice it would be most helpfull and appreciated...