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Audi Master
3,640 Answers
- Posted on Aug 08, 2010
Re: The car will pop alittle when you try to start...
Usually when a vehicle backfires, it is caused by the timing or a bad crank sensor. symtoms of a bad coolant sensor are--poor cold idle, stalling, ( rich mixture,retarded timing) slow idle speed, cold hesitation or stumble, and poor fuel milage. check coolant sensor first. good-luck!!
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