Hey guys,
I finally got to start my LS swapped Chevelle. It's a cammed LQ4 (231/235 at 0.050 and .626/.605 lift) with 243 heads milled 0.020" and ported. Victor Jr intake with a holley 4150 style throttle body and deatschwerks 50lb injectors. The car will start right up but only runs for a few seconds before backfiring out the exhaust (currently open headers) and then it immediately dies. I made a mark at TDC and checked the timing with a light but it doesn't seem to be advancing (even though I have it commanded to 15 degrees to check it). I'm sure the fuel table is off but I'm also wondering about the timing. Why is the light showing no advance? I'll post the tune file and a couple logs from startups and hopefully someone can help me out.
chevelle first start tune 1200rpm.hpt
startup attempt 1.hpl
startup 2.hpl