Thread: overkill PCM? some advice needed

Originally Posted by matt5112

Yes because you're running an afr in the tens and no timing.

with which tune??

either way, you know who to talk to about that.

i have an overkill tune, considered it good until i blew my engine up, then after replacing it got the tune looked at and he said it was running super lean due to the tune something about it being in the 14s when it should be around 10... idk i dont know tuning language, i more or less blame the overkill tune on the destruction of my motor figured the tune would at least make it safe to drive but i still should have had it fine tuned to my car... if i did the issue would have been caught in time

Originally Posted by matt5112

Who's do you think?

well don't blame me... jus sayin

That kr is on a 3.4... on the 3.5 it does decently.

and what specifically? the afr or the timing?

Originally Posted by matt5112

if you could find out what specifically is to believed to be incorrect that might mean something.

How did your engine fail?

next time i get with the guy playing with my tune ill talk to him and get more details

cyl number 2 chipped/started melting

NR92, I'm sorry to hear about your motor, but I wouldn't publically blame my PCM if you don't know specifics on why you think it was my PCM. A PCM tune is not a failsafe to do anything you want modding wise, I say so whenever asked and I say so right in the booklet I send with my PCMs. You've got a very aggressive pulley size for a GenV with headers, did you do any scanning to know what your KR is? Boost?

I know the settings that I aim for are safe and not aggressive enough that they'd have caused that type of engine damage on their own; your vehicle didn't conform to the norm or it had excessive boost/KR that went undiagnosed for too long.

I am very sympathetic to the rebuilding you've had to do because I've owned 4 GTPs myself, built motors, been there before. Just do indeed be careful about what your new tuner is doing, ensure you understand entirely what he's doing and why, and if this was an issue with a fuel supply issue or an overboost issue ensure that it's diagnosed and corrected before anything bad happens again

And Matt, "Yes because you're running an afr in the tens and no timing", come on man :headshake:

My thoughts for what it's worth. If you start modding, you need to actively scan what your car is doing. Especially in boosted applications, and running a smaller pulley. If you don't know what to look for, or what stuff means, ask! You can't blame someone if you have no idea how it happened.

Originally Posted by Overkill

NR92, I'm sorry to hear about your motor, but I wouldn't publically blame my PCM if you don't know specifics on why you think it was my PCM. A PCM tune is not a failsafe to do anything you want modding wise, I say so whenever asked and I say so right in the booklet I send with my PCMs. You've got a very aggressive pulley size for a GenV with headers, did you do any scanning to know what your KR is? Boost?

I know the settings that I aim for are safe and not aggressive enough that they'd have caused that type of engine damage on their own; your vehicle didn't conform to the norm or it had excessive boost/KR that went undiagnosed for too long.

I am very sympathetic to the rebuilding you've had to do because I've owned 4 GTPs myself, built motors, been there before. Just do indeed be careful about what your new tuner is doing, ensure you understand entirely what he's doing and why, and if this was an issue with a fuel supply issue or an overboost issue ensure that it's diagnosed and corrected before anything bad happens again

And Matt, "Yes because you're running an afr in the tens and no timing", come on man :headshake:

i assure you thats the only post i have here or anywhere else that has said anything negative about your tune, seeing as i dont know anything about tuning i was going off of what was said by the guy that looked over my tune, he said that it was running super lean and suggested that i not go into boost at all until the issue is figured out, the piston was looked over by a master tech at the local gm dealer said the most likely was related to a lean condition then i went to the tuner and heard what he said it was easy to assume, but at the same time i said i should have gotten the tune adjusted to my car the issue would have been found, its just as much my fault as anything else!

in the end i about made my money back parting out the old motor and my new motor and s/c has only 6k total miles so its hard to be even remotely upset lol!! also i would get your tune again just make sure it sits well with the car!