Went and got my truck dynoed Sat.
1st pull= HP 254.22 TQ 259.79
2nd pull= HP 236.30 TQ 250.32
Also the curves had a few bobbles in them, not smooth like all the other LS1 cars out there. But I figured that may just be because it was a truck. I would like to find my 20hp I lost on the second pull.

Then on the way home, I noticed a horrible miss. Worst around 2000rpm while slowly acellerating. WTF?? I thought it may be a tune problem, so I swapped my stock PCM back in, but it actually seemed worse with it. So I swapped my tuned PCM back in, and it got better till after about 150 miles. My plugs looked white to me, but I just put them in Thursday, so I don't know. Not real familiar with these motors, need help please.

 

Try And Just Brake Stall It And See If The Miss Is There,and Before You Do This Try And Start The It Cold And Run It Till It Gets To Normal Temp.if When You Start It The Miss Is Not There Then Once It Gets Hot The Miss Is There Then Check All Your Plugs You Might Have Cracked One.

 

Ok. Brake stalled to about 1500, and it started missing its *** off. Tried again, and everything was good. WTF?

 

I'd still check the plugs anyway, it might not be the answer but at least you'll know and its not that hard!!

 

Yea, I'm gona try that this afternoon. I pulled a couple Fri and they looked almost new. I think I'm a little lean . Anything else to check? Somethings wrong. I slowed down 4/10's with the tune, exhaust, and cam, but my mph were higher, and it pulls a lot stronger