- Oct 26, 2020
- Reaction score
Hey all, i've been having a misfire issue with my "new" 5.3. Car is a 99 Camaro, P01, SS2 cam, SEP1000s, s475, 80e. Recently I decided to start with a clean slate stock 99 z28 tune from GM. I did the 80e segment swap and then the HP Tuners 2bar speed density custom OS. Ive got O2s, fuel trims, and maf turned off for speed density and I used the VE table and some idle and spark tables as a starting point from the dontbsme P01 2bar iteration of Matts Colorado. I haven't touched anything in the misfire section. the car runs great at idle but has a noticeable vibration, like a dead cylinder, while there is some load on the motor. If anyone has some ideas on why my misfire reporting wont work id really appreciate any input, thanks!