Missfires

[psi4power]

i recently dynoed my car this weekend.. got 220 hp and 280 torque, i had a bad missfire problem, new plugs fairly new wires, plugs gapped at .32 and i moved in to .27, has anybody else had this problem and what did you use to fix it besides buying an ignition system, also does anybody any experience with the coil on plug system

 

[1fast97gsx]

you shouldn't be missfiring at that power level ... people are running 10s and 11s on stock ignition. You either have an ignition module problem or coilpack problem ... maybe something ecu related even. What cylinders are missing?

 

[1fast97gsx]

how much boost are you running? You shouldn't have to go less than .028" ...

 

[RuBiCaNT5X]

What kind of plugs? If it's anything but NGK, switch them to a BPR7ES or a BPR6ES... Platinum plugs are garbage and Iridium people have mixed results with.. Stick with the $2.50 copper NGK's... .028 - .031 is where you want to be...

 

[psi4power]

19 pounds.. brand new BPR7ES ngks... i dont know what cylinder it was i could just see power drop and go up fast then dropoff real fast and up again.... the guy running the dyno said he could feel it and it had to be a missfire, there was another gst on the dyno and it did the same thing

 

[CanadianTSi]

What kind of wires??? I've had relativly new wires go bad on when...thats what happens when you buy the shit brands :thumbdown

 

[RuBiCaNT5X]

Are your 4 injector harnesses on tight? I had a buddy who kept getting a cylinder misfire and that was his problem..

 

[psi4power]

ill check them and if anybody else has a clue it would be greatly appreciated. I have all my mods listed on my profile including my plug wires