Total Newbie here with first attempt at setting up and tuning with HPT. Having a blast screwing things up though! I have a 2008 2.4 ecotec swap out in a project Baja Offroad car. I start the engine and it either shoots up to >3000 rpm or idles rough at 800 rpm and if I touch the Pedal it shoots up to >3000 rpm. The RPM stays there but the throttle pedal does increase rpm if I press it. I pulled this motor out of a 2012 Malibu and had a bad ECM so pulled the 2008 ECM out of another car. I went to an aftermarket MAF tube that is slightly smaller than the factory and know I have to tune for that but cant get there yet. No tuning has been performed but I did remove VATS and a number of DTS's. Not sure if it is a throttle body issue. None of the accelerator position, throttle position, and or the commanded postions match and I have no idea if that is normal. I have read that manually moving the throttle plate is bad and I did do this when cleaning the throttle body before trying to start the engine. I have not been able to get the engine running well enough or stable enough to even think about tuning. I also dont know if I changed something that could have caused this.
Any input or recommendations would be greatly appreciated.