misfire problems on my 02 is300 BADLY HELP
11-18-13, 09:04 AM
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misfire problems on my 02 is300 BADLY HELP
my car started stawling felt it misfire badly so went to change my spark plugs saw that it was full of oil so changed the head gaskets and it still misfire i checked the coil packs and they are all good checked the preassure on the cylinder heads and they are over 180psi now the changed the block control vaulve filter and 2 other things and it still misfire now the mechanic is getting a used computer for the car to see if its that does anyone know of might have an idea of what can it be
11-19-13, 08:53 AM
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Vailve cover gasket was changed once i changes the head gaskets it stopped leaking.... i check the coil pack with the car on just pulled it up and u feel it loose power check engine for misfire on #5
11-20-13, 04:49 AM
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Did u change the plugs? If so, swap cyl#5 plug with any other plug and run it. Ive had new bad plugs. Delivery guy dropped them.Then swap coils if #5 comes up again. Then u can rule out coil &plug problem.
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