yes deff check your TPS, as well as MAF, an IAT sensors, any SES light on? if so go to autozone an see what the code is, the lil lip that u cut ooff suposedly helps prevent a lean mix in teh rear cylinders, but i personally know ppl who have no problems with this, also check the throttle body, and all hoses, an make sure ur intake and all i sput back on correctly, mike