My mustang gt has a 94 body and rear end, and newer everything else.. It used to have a 5.0l with auto trans., it's now got a 4.6l with a 5 speed, it has accel coil packs and complete aftermarket intake, and has the sct 3015 flash device.. When at idle it has a slight studder, when driving it has a studder, then you feel the power change and can even hear it change, and level out and run kick ***, I'm noticing that it seems to do best at mid to higher rpm... Any suggestions on any tuning with sct, and or possible mechanical help in which will straighten out my rpms and have no more studder, and be kick *** all the time.. Thanks
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5.0l auto, swapped out with 4.6l 5 speed, summit cold air, 17"saleen, cat delete, rear o2 delete, H-pipe, 94 body and rear end, 99 everything else..