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controll valve

  1. E24 (1976 - 1989)
    I have a 88' 635csi and when i star the car it idles up and down between 500 and 1000, i bought three idle control valves and those don't seem to be the problem, i unplugged the idle control valve and it idles fine until i put in gear, when i put it in gear it idles up and down between 500 and...
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