3.8 engine with three coil packs. No spark at one of the packs. Have changed the pack, plugs and plug wires. Still no sparkRelated Questions2005 Pontiac Grand PrixShould my air injection pump run all the time when the engine is running and if not, what controls its operation? Will it burn out if it runs all the time?1999 Pontiac Grand Prixthe heater motor keeps running with the key off where is the problem?02 Pontiac Grand prixIf my valve cover gasket is leaking will there be a puddle under my car?