Hello 1996 328ti, I had symptoms very similar to yours for about 2 years- I tried EVERYTHING, got to the point where the car wasn't even drive-able. I finally replaced the Intake Manifold Adjuster Valve. FIXED!!! This part is only available from BMW as far as I know. It was $365 from my local dealer. This valve is located in the lower half of the intake manifold, just underneath where the two intake parts come together on the driver side. Its definitely worth a try in order to get a good running car back. |