99 gran prix gtp v6 supercharged runs good till service eng light blimks then she like misses on a cpl cylinders light stops blinking and goes off runs perfect again and yes has good boost

Asked by George Oct 03, 2013 at 12:23 AM about the 1999 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

Question type: Maintenance & Repair

a few people have said coil pack issues like today started it right up ran good 4 miles then service engine light started blinking and she started missing id appreciate advice and what auto parts runs ur codes for you

17,995

Goodwrench707 answered 10 years ago

You need to have it scanned for error codes. The blinking light can be caused by many things. Only a scanner will help pinpoint the problem.

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99 gran prix gtp v6 supercharged runs good till service eng light blimks then she like misses on a cpl cylinders light stops blinking and goes off runs perfect again and yes has good boost

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99 gran prix gtp v6 supercharged runs good till service eng light blimks then she like misses on a cpl cylinders light stops blinking and goes off runs perfect again and yes has good boost

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