Got a mixed bag going on. 2003 corvette z06, motor blew, owner decided to put a GMPP LS376 and standalone computer into it. No codes popping up on either ECU but the pedal goes dead after you try to drive it. Driving it around under very light throttle is fine but anything over say 25% throttle it goes into limp/reduced power and the pedal is not responsive. From what I gather the coolant/tach/vss from the new ecu is spliced into the old ecu. Its got the factory ecu under the fender and a new ecu up front. When it goes into limp mode, the pedal will not work and no codes pop up.