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New plugs,wires,all 3 coil packs,o rings for fuel injectors & cleaned mass air flow sensor.

Vehicle: 2000 pontiac gran prix 3.1

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Hi there,

Usually when you are lacking spark in one of the coil packs it's a problem with the ignition module under the coil packs. Replace that and it should solve the problem. If not, then check the wiring to the coil pack that's not working

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