epiciocc

2001 F-150 5.4L 93K miles.

I have been chasing a ghost for about 2 months. I have the classic hesitation-misfire problem. Codes reported Cylinder 1 &5 misfire. So I changed all the coils, codes remained, but cylinder 7 reported, changed all plugs and fuel filter.
Now Cylinder 1,3,4 report misfire. Replaced original coil on #1, codes remains.
Can an Oxygen sensor or other sensor fool the computer to mis-code an error?
I'm also thinking what is common with all the cylinders firing, what controls them all? Should I look there?
I should also mention on a scale of 1 - 10 when the car is first started in the morning it runs at about a 3, after the engine thoroughly warms up it runs at about an 8.

Thanks,
Ed

sharkbait

check for moisture in the plug holes.

the 02 sensor isnt what finds misfires...its actually the crank position sensor and it runs off the power pulses