why did my 2003 pontiac grand prix backfire when i try to start it

Asked by Nov 02, 2013 at 01:39 AM about the 2003 Pontiac Grand Prix GT

Question type: Maintenance & Repair

2 Answers

just replaced upper n lower intake manifold gaskets wires plugs coil packs intake manifold

1,115

Extremely lean caused by new manifold gaskets leaking unmetered air or the spark plug wires are not going to the correct plugs.

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