1989 525I with 173800 mi is slow to accelerate from a standing start and has little power climbing up hill. I noticed the other day that in really cold weather wayyyyyy below freezing!!!!!!! the idle is fluctuating right after starting, but I have no idle problems if the car sits in a heated garage overnight. I recently had the car shipped to Minnesota after not being driven for almost 7 months. Any ideas on where to start would be helpful.
Jim