dclark08

I have a 2002 F150 5.4. I have a cylinder #7 misfire, I have changed the spark plug, boot, coil pack, injector, and I have good compression. It misses the most when it is at lower rpm's and under load. Any help would be greatly appreciated!!

techrep

iTrader: (1)

Have you read out the COP wires yet...

dclark08

I have checked both the wires going to the coil and the injector and they both appear to be good.

techrep

iTrader: (1)

so..they have the proper voltage going to them ??

dclark08

Yes I had proper voltage one both.

techrep

iTrader: (1)

Then it has to be the plug or COP...what brands did you install ??

VFL

Which cylinder are you calling #7? We had a guy the other day come into my work saying he has changed the cop and plug 3 or 4 times on cylinder 8. I mentioned how 8 is a pain to reach and he said no it's up front. It was at that point I had to explain to him that this entire time he has been swapping out number 5.

dclark08

The second one from the back on the driver side.

VFL

OK good. I figured it was worth a shot.

techrep

iTrader: (1)

brands ??