I've been running the MaftPro with an extender extreme pro chip for around 10 years without a Maf sensor and have never experienced any idling or driving problems. Idle,part throttle,wot is all great. I haven't made any adjustments to the setup in years. I always liked the set it and forget it way of doing things. I do the boost and alky adjustments the same way. Keep it simple. Seems everyone who has a problem with their car they want to blame the parts on the car instead of operator error/adjustments. Maybe you could make a thread in the regional section for someone in your area to help you get it sorted out. That would be better than someone trying to help over the internet.