Breakin up BAD in high rpms HELP ME!!!

[ZxAlucard6r]

Well i was runnin PIG rich for the past week, and finaly got around to tuning today.

Well ive been having this intermittent problem where when i put it to the floor at high rpms it just misfires like crazy and starts to sound like a machine gun.

TOday i got my A/F to a constant 11.5:1 and the car responded nicely, pulls hard as shit.

BUt then it came back, nearly every time i put it to the floor the same thing, breaks up, its like hitting a 2-step. Also when this happens im getting about 5* KR

Any ideas?? I am running the siemens 60lb injectors BTW. Other than that i have NEW Copper SRT-4 Plugs in there

[crazybrew609]

slightly clogged cat?... try gutting it and that might solve all issues

[fullthrottle]

Originally Posted by ZxAlucard6r

Well i was runnin PIG rich for the past week, and finaly got around to tuning today.

Well ive been having this intermittent problem where when i put it to the floor at high rpms it just misfires like crazy and starts to sound like a machine gun.

TOday i got my A/F to a constant 11.5:1 and the car responded nicely, pulls hard as shit.

BUt then it came back, nearly every time i put it to the floor the same thing, breaks up, its like hitting a 2-step. Also when this happens im getting about 5* KR

Any ideas?? I am running the siemens 60lb injectors BTW. Other than that i have NEW Copper SRT-4 Plugs in there

any data logs and or copy of tune.

[ZxAlucard6r]

Originally Posted by crazybrew609

slightly clogged cat?... try gutting it and that might solve all issues

No cat to clogg. Ill post up some logs here in a min

[Juggernaut]

I am having the exact same problem. Please post if you find a fix for this and I will do the same.

[redlineinsc]

i had that prob... my head had 2 exhaust lifters locked down... the car would hesitate hard when i was WOT in high rpm ranges, and my car sounded like a Subaru

[Mase]

change the gap on your plugs to .03", I use NGK BKR7E's

if that doesn't work

increase your "base dwell time vs rpm vs ignv" only increase from where you see it breaking up, such as 6000rpm and up. Add all the way down the vertical (voltage) and add in 5% increaments until it goes away.

Another good idea is to remove the AL cover on top of your coils, they get hot so some air flow would help with cooling.