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Message: <blockquote data-quote="MuscleInc1320" data-source="post: 616982" data-attributes="member: 9547"><p>tps voltage is .84 and 4.66 with throttle open. cleaned the maf and i run cold air intake with a brand new k&n filter. i am thinging tho that if it was fuel then the problem would always be there even more so at wot. the fpr should be good...it's a bbk one that is only about 3 years old. just check fuel pressure and it is a constant 39-40. i sprayed carb cleaner all around the intake and vac lines while the car was running to see if i had a leak. didnt find any. but i notice that the car idle is fluctuating and that even in neutral if i give it a little gas and hold it that it still makes that shuttering bucking sound. plus my check engine light is off so i know it has nothing to do with the evap system...or at least i hope</p></blockquote><p></p>