"NOT SAYING THIS IS YOUR PROBLEM" But I've seen a harness issue give that 'no throttle response' the harness at fault was in the passenger foot well it hangs down so when a passenger stretches out by placing their feet on the harness it pulls at connectors on PCM the fix was to push pin all the way back into their slots and strap the harness with a insulated clamp to side of blower motor case to eliminate the hanging and ply.