Running alittle ruff so changed plugs now no power in speed and cuts out and no fire to number 1 plug need help

Probably a head gasket problem,once again. It's burning the coolant off the plug . To make sure ,use a "block tester" from NAPA ,it is a liquid that changes color with the presence of exhaust gas in the coolant.

sounds like it could be a burn plug wire on the number 7 plug

sounds like you have the firing order off ! re- trace your wires from coil packs to plugs, you have one or several mixed up, the coil packs are numbered, and you wil have 135 on one bank and 246 on the other, If I'm not mistaken 135 are closest to the radiator, you can tell by seeing which head is the farthest forward towards pass side of car and that is Bank 1 which will have 135 cylinders.

fuel filter?

Firing order is same for 5.0L or 5.7L

Loss of Power, too?

Burnt Valve! My guess - cylinder 3.

maybe injector is not firing also check compression on that cyl

TRY and idle your car up alittle to see if problem goes away if not then look into replacing your catolitic convertor.

sounds like spark plugs or spark plug cables are bad and it is in fact misfiring this happened to me in my car and my spark plug cables were bad

replace the coil pack... to confirm this pull spark plug leads off the coil pack one at a time.... note whether the idle changes. the spark will actually arc and you can hear it. if one of the plugs does not have this arcing... the coil pack is at fault.

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