2001 Ford F-150 Repair Question
2001 Ford F-150 5.4L
Sounds like you have a vaccum leak, check underthe hood for visable leaks, repair as needed to recheck system.
1,219 answers provided
there is a vaccum line that runs from the PCV valve on passange side valve cover follow that lint up to the intake and look at the rubber end of it. if it is soft or has a hole in it replace it.do you by chance have a check engine light on.? if so with a vaccum leak the a scanner shoud read O2 sensor lean bank one. (NOS) 8)
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