So far i have stripped and cleaned the stepper motor and throttle bodie and check all of the pipes for any splits or leaks the stepper motor has been replaced on the 9/8/2012
yes i have put a code reader on it no codes logged and when the stepper pipe is connected the drives like a bang of p** accelatoring away and then backing off
Have you checked the stepper pipe for blockages has a coil pack failed or spark plug when was the fuel filter last changed could there be a loose plug anywhere? These are the only thing that I could think of
i have just been to the scrappies and got another map sensor and stepper motor even tho my one stepper is new as of 9/8/2012 and also a standard airbox to get rid of the induction kit