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rpmdiag
rpmdiag, Tech and Instructor
Category: Ford
Satisfied Customers: 6989
Experience:  Since 1975
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2001 Ford F150 4x4 5.4 idling rough, runs rough, acts like

Customer Question

2001 Ford F150 4x4 5.4 idling rough, runs rough, acts like its running on 6 cylinders. Exhaust smells, not like eggs or gas.
JA: Is the rough idle intermittent or consistent?
Customer: consistent
JA: Are you fixing your F150 yourself? What have you tried so far?
Customer: Yes
JA: Anything else you want the mechanic to know before I connect you?
Customer: Replaced both upstream o2 sensors,,fuel filter, intake manifold gaskets
Submitted: 2 months ago.
Category: Ford
Expert:  rpmdiag replied 2 months ago.

Hi, I'm Ron and I will be helping you today.
Stand by for a moment while I prepare your answer.

Expert:  rpmdiag replied 2 months ago.

Those symptoms can be related to ignition, fuel or engine compression.

many tests need to be done to check all these possibilities.

A scan tool, lab scope, fuel pressure gauge and test light will be needed to check this system.

Thanks, Ron

Customer: replied 2 months ago.
Checked fuel pressure 35 key on, 40 when started
Expert:  rpmdiag replied 2 months ago.

Understood, but there are many more things to check as I stated.

Thanks again and please remember to rate me 5 stars and keep this link in case you need me again later on.

Ron

Customer: replied 2 months ago.
Replaced 8 cops, spark plugs,
Expert:  rpmdiag replied 2 months ago.

Please do ALL the testing I suggested and let me know the results.

Also please remember that I do NOT get credit for helping you until you rate me.

Thanks again, Ron

Expert:  rpmdiag replied 2 months ago.

If you are satisfied with my answer, I would greatly appreciate a 5
star rating now and I will still assist you after you have rated me
too if another question pops up. I don’t get credit for helping you
until you rate me.
Thanks again, Ron