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Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23001
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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FX4 4x4: I have a 2006 fx4 5.4 Had a miss Change plugs ran

Customer Question

I have a 2006 fx4 5.4 Had a miss Change plugs ran good for 6000 to 8000 miles miss came back Change the boots ran good for 2000 miles miss came back Change coils miss still there slite miss at idle lower rpm miss higher rpm (2200 and up miss is alot less noticeably ?
Submitted: 1 year ago.
Category: Ford
Expert:  A. Penland replied 1 year ago.
Hello and thanks for using JustAnswer.I will try my best to help you with your question.
Did you check the spark plugs when you replaced the boots?
Have you checked for any trouble codes in the PCM (Engine Computer)?