Thinking it’s something else tps resistance is smooth and never ran right from time of swap trying to find problem it’s like in limp mode ecu runs great on another swap my buddy has
2003 5.3 with 99 harness and computer, cable throttle body starts and idles fine but when you give throttle it’s like key switch is turned on and off unless you unplug tps. Already changed out tps same problem any help is greatly appreciated..
Cleaned all injectors and still same idles high and when you hit accelerator is will surge up and down as long as throttle is closed it just idles high
2003 yukon5.3 into a 94c1500 cut my own harness and added a dbc throttle body and harness from 99 silverado. I’ve checked tps checked good it has aeromotive fuel pump installed