hi,
2007 5.4
i felt i had a misfire, took it to ford dealer.
they replaced #5 cop.
after this i felt it had a totaly different miss, they told me after all checks again, cant find reason .
they called ford , ford asked if it had an aftermarket exhaust on it and they told ford no.
they knew i did, not that that matters ? ford says if it did could be less back pressure . ford cop out ????? lol
my real question is , if they had to replace # 5 cop would you think # 5 plug could be fouled from not firing for some period of time ??????
need to find real reason not fords bs

 

Yes it very well could foul a plug by a COP going bad. I always put a plug in when I do a COP.


Shane

 

thank you shane,
i felt the same way , im wondering why the dealer didnt think that way also.
i guess i need to change it out myself to try to see if thats it, as the dealer seems to want to say they have exhausted their checks .
the miss is enough to feel in the passenger seat, so i know its somthing that needs to be found.

 

As long as they dont snap off in the heads.....

 

Damn, this is the first'06 or '07 I've read of with COP issues. I was hoping maybe it wasn't an issue as of the past couple of years.