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 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

1 Answer

8,815

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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