Without a bit more info I can only assume that the little explosions your talking about are actually sounds of the intake backfireing. Typically that is a sign of a sticky valve or timing way off (timing chain is streatched or the belt tensioner has reached its end)
it could also be a leaky exhaust manifold gasket. Since you have the 4.6 liter engine most people also think that they never have to replace the plugs so you may either have incorrect temp plugs or plugs that are just worn into oblivion.
I'm leaning toward sticky valves concidering the mileage and the sounds.
What happens if you hold your hand over the exhaust tip at the back of your car, does it feel smooth at idle or do you feel a bit of pop to it?
Theres really alot it copuld be and without narrowing it down a bit its gunna be really tough to narrow it down.
May I ask what diagnostic steps you've taken so far?
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Tuesday, January 16th, 2007 AT 4:10 PM
