Question about 2006 Pontiac Grand Prix

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2006 Pontiac Grand Prix, Just changed the spark plugs and now the engine light is flashing. Start the car and everything is fine, put it in gear and throttle it up and it sputters, shakes and the light comes on flashing. Stop shutdown the car and start again and the car is fine until it is put in gear and throttled up. Replaced plugs with NGK G Power Platinum Tip number TR55GP which is (according to the garage I purchased them) the right replacement plugs. I was going to replace with AC Delco should I or do the brand matter? Also what could be my issue, the caps are all on good and I heard the little snap of the cap going on the plug however the caps were very hard to remove maybe I damaged them on removal?? I am absolutely lost here. Any pointers?????

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Sound like your firing order is off maybe one of the wires got swtched

Posted on Mar 30, 2011

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