So I’m wondering what would cause an ecu when installed in an awp 1.8t 5 speed car to have 0 throttle response and not go above idle
The ecus is shot, its a common problem with the wideband 1.8t ecus when the o2 sensor wires are shorted out. May not be a problem on your car but the original car that the modified ecu is out of had some kind of short on the o2 sensor circuit and fired the ecu.