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

Asked by Jul 19, 2014 at 07:31 PM about the 1998 Ford F-150 XLT Extended Cab LB

Question type: Maintenance & Repair

7 Answers


Are you getting a CEL light?

1 out of 1 people think this is helpful.
Renay Anthony



Go AutoZone and have them scan the car's computer and tell you what it says.

1 out of 1 people think this is helpful.
Renay Anthony

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.

Renay Anthony

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?

Renay Anthony

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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