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Re: 1990 525i hesitation slight rough idle and check engine
Ticking sound is probably valves. Thats normal.
Have you changed the air mass meter? It's expensive and probably has not been changed before you got it.
What all have you checked/changed?
Throttle Position switch comes to mind also.
Regards
Bill
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ShadeTreeBill
1989 525i Cirrus Blue Automatic
2002 White Malibu (wife's car!)
shade tree mechanic - an amateur or otherwise marginally competent mechanic who primarily works on cars out back under a "shade tree" which serves both to provide a cool place to work, and a handy tree limb to attach the block and tackle to remove the engine.
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