I have a 1987 BMW 325i Stick shift. Yesterday, the engine sounded a bit rough, I thought it might be time for a tune up - been about a year since the last one. I just had the oil changed, but the oil service light did not go off. The oil pressure looks good - Today on my way to work (a 30 minute drive) the engine still sounded rough...I noticed that upon accelleration, say up a hill or getting to speed o the freeway, it bucked a bit - almost like the transmission was slipping....I was afraid that I wouldn't get to work - no smoke, but the car smelled "hot" when I got to work. I checked all the fluids again - couldn't see anything off - the temperature gage was normal, too. Any ideas? I'm afraid to drive it now...don't want to permanently damage it.
clicking sound and bucking at high rpm on 1990 BMW 325i
by lwright633 in Oak Harbor, WA on May 24, 2010
ANSWER by Bret Bodas , May 25, 2010
It's so difficult to know what might be happening without experiencing the problem. You should take it to a shop and have a mechanic go for a drive so you can demonstrate the problem to them. Here are some in your area: http://repairpal.com/directory?address=98277&car_brand_names=BMW
ANSWER by Visitor , October 18, 2010
There might be a chance your catalytic converter is not letting the engine vent out all the exhaust. Just a guess?