2005 3v 5.4 Misfire Problem?
Guys (and Girls I guess),
I have a 2005 F150 with a 3v 5.4 engine. It only has 71,00 miles on it, but now I'm having a misfire issue. It only seems to happen when I'm accelerating rather hard. Under normal acceleration it usually isn't noticeable. The guy at the ford dealer immediately said Coil Pack issues.? Thats why I got on here and started researching it. I have noticed a few times if I get it to stutter, for lack of a better description, when I really slam the accelerator down, I have gotten a back fire in the intake.??? Any and all help would be appreciated.
PS. I run an Edge Evolution tuner on it (which is set to factory right now). Could this be the reason I'm having issues?
I have always been a Ford guy to the core, but this damn truck has already cost me a new exhaust manni to the tune of $300 dollars and now this, which who knows how much this will be.