2005 GTO TT won't rev past 5000rpms under load.
As the title says I am having a hard time getting the car to run past 5000rpms. It builds up to around 10psi of boost and then it's like I threw an anchor out. Still has fuel as best I can tell by the afr reading. Did notice about 0.5 knock showing up. Running twin 68/70's and using the cxracing intercooler and piping. Running speed density. I am wondering if it's the heat here in north Alabama right now that's causing some of the issue. Still new to tuning so still trying to learn all I can. Also not easy to start back up when hot. Any ideas? Tried some different plugs today BR7's gapped to .025. ran worse at idle and same up top not going past 5k.:banghead: