My 1998 ford f150 4.6 liter is still running rough have changed catalytic converters coils worse and spark plugs I am out of ideas
Are you getting a CEL light?
Go AutoZone and have them scan the car's computer and tell you what it says.
Thehave and they told us that it was not the coils All they can find is a loss in pressure.It is running better but it still has issue with shaking.and it does not have the power it always had before.
Wil a bad lift are a cracked head do this?
Yes, but so will a lot of other things. What pressure are you talkin about?
i do not know I just know this truck used to run like a power house and now when you try tp get to 70 mph you have to floor it and the rpm gauge shoots up.
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