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Irregular idle 200 1989

posted by  Onkel Udo II on  Tue Nov 10 13:19 CST 2015
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last visit: Fri Oct 24 08:50 CST 2014
[RELATED]

Clean the throttle body
Clean the IAC
Check for vac leaks in particular areas that would tend to open up when cold

90% of the time one of those three are your issue but...

My 940 was displaying half of these symptoms (rough cold idle and difficulty rev'ing cold) and it was a one-off ignition component issue. Basically the spark was having to jump a gap between the sparkplug nipple and stud before jumping the gap at the other end of the plug on two different plugs.






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