Mechanics

CAR RUNS GOOD, BUT WHEN IM CRUISING 55-65MPR UNDER 3K RPM THE CAR WILL JERK ONCE OR TWICE. ID FULL TUNE UP ALSO CHANGE THROTTLE BODY.

1991 BMW 535i • 176 miles

Its been doing this for about a year. It does it the most at 55 mph at low rpms. The 55 mark is red. Dont know if that mean anything. What can be the problem

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Deucey
November 21, 2011.



Bad crank sensor

Dr. Hagerty
Mar 11, 2013.