What is your question?
·
·
What is your question?
Hello, 1999 BMW 318i issues that I hope you guys can give me an assist with: 1 In the morning, car tends to have some hesitation when the engine is cold. 2 When car stops completely and it is in D, and I have the foot on the brake, the engine (feels like engine) begins to shake. But when I take my foot off brake, shaking stops. 3 When I do stop the car, the RPM's dip and it feels like engine is about to stop, but then stabilizes, although the shaking begins. 4 Sometimes when I'm driving at higher speeds and apply the brake, RPM's rev up when they should be going down. Feels like when taking the car from 4th gear to 3rd and it still has too much speed. This is momentary and immediately RPM's begin to decrease. Car runs great, transmission is not slipping, and engine feels like it is running fine. I have changed the spark plugs, air filter, and exhaust sensors. Any help would be greatly appreciated! Many thanks in advance, Paul
What makes this problem better or worse?
When engine is cold for hesitation and RPM decrease. When at higher speeds for RPM increase and going down hill.
How long has your 1999 BMW 318ti had this problem?
Two weeks
1 Reply
Hello, since your brake booster for power brakes works off of engine vacuum, and your engine performance is in question in related ways, I'm concerned you could have some kind of vacuum leak and / or air intake concern related to engine performance. If air is getting into the engine when not desired, or not enough gets into the engine, performance suffers, especially at idle.