Thread: Stumbling

I have a 2005 gp that was a base model and i have since did a motor swap the s/c. I have an Overkill PCM, wizaired,SLP cat-back, 104's, 180*, and I scan with a LS1M and my aeroforce. Now at medium to full throttle I get bad break up. It feels like it is stumbling and no power. I noticed about 1-3* of kr every once in a while and my fuel trims seem to be off. I am not sure what my map readings are supposed to be but they seem high. I am new to tuning so any input as to what i should try would be appreciated. I will attach scans for you to look at. Thanks Duane

102008 pm from duane9586 -- Scan Depot dot net

2nd half 1020 from duane9586 -- Scan Depot dot net

1st things 1st...
Your trims aren't even close, but at least the lean negative
That being said, I don't get how your O2s are so low

2nd
Either your scanner is way off or you've shortened your MODs list a bunch.
With what you've listed I don't see you getting 14# of boost???

3rd, and off topic...
Put an image tag around the link in your sig to make it work right

You may have to shrink it down a bit as well, not sure what size max isx on this forum.

Needless to say, we're going to need a bit more info on your set-up to give you a better answer to your question
Full disclosure is a must since we can't edit the BIN in an Overkill PCM. We can only look for mechanical, fuel, or human problem.

Thanks for looking. My mods are as followed: Overkill, Wizaired, 104's, s/c, and SLP 2.5 cat back. I know my boost is not 14psi. My mechanical gauge reads 10psi unless i hook up the bbv then i only get 4psi but the car does not stumble with it hooked up. I have the bbv connector hooked up to the pcm and the emissions fuse but i still get code P0243 and only 4psi of boost. Not sure about that. I just realized that I have not changed out my fuel pump yet but i will this week i have one in my garage. I also have a unknown code P2761. Thanks for all of your help

Rewired my bbv and now the code is gone and i get 10# but it breaks up at any boost over 5#. Hopefully I can change the fuel pump on Thursday. I will keep you posted

1 step at a time, you're doing it right

I have talked with will at overkill and he is going to reprogram the pcm to try and get the fuel trims where they are supposed to be. Thanks for all your input.