Ok, I've taken my car to Ford 3 times now. I have a pesky consistant misfire. Each time, they change the plugs thinking it'll fix it. I put in Autolite 764's at first, still misfired, then I tried APP764's, double platinums, still misfired. Then I tried Motorcraft platinums, still misfired. Ford has changed the plugs themselves 3 times and it still misfires.
The plugs were gapped properly. The timing is at stock. The coil packs are fine, according to Ford. None of the wiring is shot, once again, according to Ford.
The misfires only happen under heavy load/high rpms or sustained rpm's. Under very casual conditions, the car doesn't act up. But once that misfire code sets off, the car immediately becomes gutless and remains so even after the service engine light is off. The only "cure" is to reset the computer. Then, for a brief while, it's back to it's peppy self.
Ford has my car yet again, today. If the problem still isn't solved, what should I try next? I've been looking into getting a plasma booster purely for the sake of it's supposed ability to cure misfires. But, i feel that even that is merely a band-aid. I'd like to actually solve the problem not just simply make it go away by drowning it out.
Thanks for any info.
The plugs were gapped properly. The timing is at stock. The coil packs are fine, according to Ford. None of the wiring is shot, once again, according to Ford.
The misfires only happen under heavy load/high rpms or sustained rpm's. Under very casual conditions, the car doesn't act up. But once that misfire code sets off, the car immediately becomes gutless and remains so even after the service engine light is off. The only "cure" is to reset the computer. Then, for a brief while, it's back to it's peppy self.
Ford has my car yet again, today. If the problem still isn't solved, what should I try next? I've been looking into getting a plasma booster purely for the sake of it's supposed ability to cure misfires. But, i feel that even that is merely a band-aid. I'd like to actually solve the problem not just simply make it go away by drowning it out.
Thanks for any info.