Thanks for the help guys.

I have a new log with the PE fuel dump taken out. It looks to me like its running fine in the log, however it is very hesitant and accelerates crappy like multiple misfires are going on.

Could someone take a quick look and see if there is something out of whack.
There is a different pcm in there reflashed to the yukon, which is why he says it still says olds in the header, but it is my truck..

 

Is that wideband hooked up to anything? The log looks a lot better, but it looks like your lingering issue is still fuel related. Hard to say without a reliable wideband though.

 

Thanks for the help. I have been trying to get him to send me a log with a correct wideband reading for over a week now. They cant seem to even do that for me.

If the engine is breaking up under boost, Wont misfires show up in the wideband log as lean spikes as the unused o2 is picked up by the wideband???

They keep telling me that the a/f is fine, but cant show me a log.
I would take it somewhere else but I have already paid for them work. Anyone have a LS tuner mechanic recommendations for the Denver area? I guess eventually Ill have too. 7 months later I still dont have a working truck..

I dont know wtf to do now...

 

In my experience, the wideband wont see it but the normal o2s will, which is why I always keep them enabled.

A rich misfire will make it feel like a dog, but otherwise generally look fine. You may get a lot of smoke too.

 

So I think we finally got it worked out. I ordered a new PCM with the latest updates from gm and it is working now. I was told that since my pcm is a 2000 gmc and has never been updated by the dealer it wasnt working properly with HP tuners. So we put a new pcm in with the latest updates from GM and now it seems to be fine..

Anyone else have this issue before???

Thanks guys for the input on this issue...