Hey y'all, I'm new to tuning and I've ran into a bit of a snag. For the last few years, I've been working on rebuilding an LS1 to swap into an '87 trans am. Motor is all stock except for a torquer v2 camshaft (232/234.600"/.600" 112 LSA), valve springs, and hardened pushrods. Now that I finally have it back together and In the car, I can't really get it to run right. My issue is that the engine backfires under 900-1000rpm, and flat out refuses to run under about 750rpm. I'm running it off the stock tune which I'm sure doesn't help much but I am unsure what parameters to adjust and figured I should ask for help before I blow something up. Attached are my log and tune files: Factory Tune NO VATS.hpt Runs but backfires.hpl
Any help would be greatly appreciated, thank you!