Ensure the floor mat is not restricting the accelerator pedal movement. Use the can tool to monitor the throttle position.
Sorry I do not have the information as to what interface to use.
The scan tool that I use automatically searches for the correct interface when required.
Did you check the exhaust system for clogging and what about the air filter and intake system?
Wednesday, February 12th, 2014 AT 8:11 AM