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Miss at idle

Old Dec 2, 2025 | 07:01 PM
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From: Las Vegas
Miss at idle

07 5.4 2wd
Motor now has just under 4k on it.

New timing set, Ford phasers ( but they are locked out and tuned out)


New fuel filter, injectors, plugs, coils, maf, air filter, cats, O2's


I have a slight miss at idle, not enough to throw a code, but enough you can feel it in the seat.

Watching power balance on IDS I can see misfires, missing #4 the worst, but all bank 1 is missing.


I have smoked the intake and have no leaks.


My LTFT are about -7% on both banks, sometimes bank 2 will go to -3% .STFT never go over +3/-3% on both banks.


I'm sure there's info I'm missing.


Please help this misfire is driving me crazy, it's not what I expected after a new motor.Thanks

Sorry for the double post
 

Last edited by Fiction1990; Dec 2, 2025 at 07:03 PM.
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