Engine has a miss
Asked by XPEDITER1 Jan 28, 2017 at 12:44 PM about the 2006 Ford F-150 XL SuperCab
Question type: Maintenance & Repair
My 2006 F 150 4.6.Has a miss that
recurs,first dealer said it was
injector which he replaced
$$$.Then after a short period of
time it stared again.Took it to a
reputable shop and they said it was
the ecm..Replaced $$$.About 1
month later same miss came
back.Took it back and he said was
a coil on #1.Replaced $$$.Now
three weeks later miss is back...Any
Ideas.Losing confidence in dealer
and shop.
7 Answers
90% of the tune a misfire on these engines is coil/plug related. I can't belive anyone would jump to injector or pcm first before even doing the coil. Is it the same cylinder misfiring or a different one? These tend to start to fail one after the other until all 8 have been swapped
CITYLIFE404 answered 7 years ago
isolate the miss fire to the cylinder. then figure out if it misses at idle or under load. small vacuum leaks in the manifold can cause misfire at idle but not usually above idle. it may be as simple as incorrect gap in the plug. or valve sticking open causing low compression misfire.
Ivannewfordowner answered 6 years ago
I have changed all coils and plugs number is still misfiring
CITYLIFE404 answered 6 years ago
When does it miss fire. Under load or at idle or all the time. Also does the check engine flash or jus comes on and what codes do you have
Yes mine is doing the same thing. I have replaced all the coils.......any advice please
My Ford F-150 has a Miss to it I put new spark plugs in it you still missing
Have 5.4 triton Ford F-150 . Have replaced all plugs ,coils, injector, throttle body . Still has a miss at idle and under load. And when you try to press the gas to go it cuts out so bad it won’t speed up. Gas has to be pressed gently.
