Okay so here's the skinny on what's going on with my project, I got it tuned for a thunder racing 3798R camshaft and 243 heads, and headers and exhaust. Now I've put an ls2 intake with a 102mm TB and I'm tuning the car now and it won't idle below 1000 rpms, after getting back from my tuner her was just throwing a bunch of timing in at idle the lower it down so I'm trying to get it back stock and go from there to see what I have to do to lower the idle, any help will be greatly appreciated.
It's in a 99 trans am with a t56