I have a 02 Camaro SS with 60k miles and recently put speed engineering headers and exhaust on, stage 2 Texas speed cam, Texas speed stealth intake manifold, 92mm throttle body, Bosch 36# injectors and removed the secondary AIR accessories and fuse. After receiving my ecm back from the mail order tuner the car finally runs and drives after installing the upgrades but in all 6 gears it will stutter and cut out at 3300 rpm but as soon as it gets below that it runs fine no issues. Has anyone had this problem before? It almost seems like it’s starving for fuel but only at 3300 rpm and I have no check engine lights on.

 

Did you contact the tuner? If all was good before this work and you checked for vacuum leaks and have no DTC's contact the tuner. It might take multiple times for the tune to be right