Shortly after having gotten a EC S/C pulley, ecu tune, and tcu tune, I have been having a seriously rough idle and lose of power. This problem does not happen right away, but only after driving for a little while then coming to a complete stop. When this is happening I get almost zero throttle response and have a hard time getting from 0 to 40. The misfire will happen badly some times and some times it will stop completly. The check engine light will go off and it will drive fine. I have put nearly 1200 miles on the car since the last time this happened. Originally I thought it might have been just bad gas because after limping it home it stoped and has been fine since then, also there is no white smoke coming from the pipes. I figure the rough idle/ misefire could be anything from bad plugs to even worse "especially for this car" a cracked piston. I'm not sure due to the off and on nature of the problem. The problem just started back up and the car barely moves when its like this.

If any body with similar mods has had this problem your insight will be greatly appreciated. Or any one who has any suggestions period their input will also be greatly appreciated.

PLEASE HELP !!!