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
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
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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