Check out the tps code. You can use digital multimeter on the tps signal wire. With key on, vehicle doesn't need to be running, watch the voltage reading while you work the throttle. See if the voltage reading moves up and down smoothly?
As far as the ecm, I'd check voltage and grounds circuits to the ecm first. You can also check ref voltage at any engine sensor, where applicable, key on, the voltage comes from the ecm.
Thursday, March 10th, 2011 AT 8:12 PM