I did a search and a lot of reading low rpm KR and believe I may either have too high timing or tranny/engine lugging condition or a combination of all three. I have an 02 Silverado with typical bolt ons and recently added a whipple charger. Along with the whipple, I added 42lb injectors, a walbro inline, and a Nelson tuned PCM for the whipple. I have been running the whipple for about 3 months now and it has a low to mid throttle ping and tends to do it around 2K rpms....no KR at WOT or from a stop to WOT.

Been through about 5 PCM swaps with Nelson and still have the problem. Allen suggested I get HPTuners and start logging some data. I also have an AEM WB but haven't yet connected it to the MVPI Pro cable. I know, I know.....just haven't had time...

Anyway....I've sent logs to Allen and have not been successful in getting this KR fixed. He suggested SD 2bar......but I really just want to get rid of the KR. Maybe I'll play with more power later, just don't want a blown engine right now.

Can anyone look at my logs and see anything obvious? My timing looks high to me, but I have no idea what is high on these engines.

I just got my PCM unlocked from Nelson a few days ago.....now I'm not sure if I wanna mess too much with it, but I do want to get rid of the KR.

HPlog4.hpl

HPlog5.hpl

 

your timing looks OK, start by multiplying everything from 3k to 10khz by 1.05 in your maf table-reset your fuel trims-then follow sticky in the tuning section to tweak the rest of the maf table that should fix alot of it but you need to tune the maf curve