Engine Performance problem
2000 BMW 740 V8 Two Wheel Drive Automatic 120000 miles
Start hearing a loud squealing noise which I thought was a dry belt. Noise only starts if I accellerate and stops if I give the pedal a quick hit but after a few days it didnt get better and when this noise appears the vehicle runs rough and tries surging forward. Last time noise started I stopped and looked under the hood and cldnt tell where the noise was coming from so I decided to take the oil cap off and when I did noise instantly stopped and car ran smooth, when I put cap back on noise started again. Also when taking cap of it seemed like it was under a lot of pressure.
Sunday, April 6th, 2008 AT 8:05 PM