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Old 09-24-2013, 09:46 PM
Tech II Tech II is offline
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Re: 1998 Grand Prix no start

Well, it's running rich....plugs and possibly the O2 sensor are fouled......could be a leaking F/P regulator, bad wire(s), bad plugs, bad coil(s)[did you check spark at all 6 terminals?], bad MAF sensor, dirty air filter, leaking injector, etc.

Checking for codes, you will probably find a P0300(misfire code)......If it is a misfire, you have to isolate which cylinder(s) is at fault....
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