I am having some issues with my car right now! I was wondering what to do about them. Well my car bucks and feels like it misfires as soon as I hit boost or even a little before it in the 5-0 vacuum range. When I hit full boost it rarely happens. I dont know what the hell is going on. It seems as if the car is miss firing. I have two situations that I am looking at. I changed my spark plugs so that is not the problem(the old ones arent that bad either).

-I am going to do a tune up. Plug wires, cap and rotor! (they are original with 66k on them)
- Change the fuel pump to a walbro 255- (stock fuel pump is in there)

The car has a t28 on a stock DE with 370cc injectors. The spark plugs are NGK BKR7E gapped to .025 ! It also has S4 cams with the jwt ecu programmed correctly for everything the car has. My timing is set at 15 degrees and this started when I went to the track on wednesday august 28th. I dont know what it could be but I am going to start out with a tune up. If that doesnt work then I am going to get a new fuel pump. Whatever it takes or if any suggestions sound good I will try them. Thanks again and if anyone has experience with this or knows anything to do to cure this please let me know, thanks again and have a good one!

Try checking all your couplers and IC piping..I experienced the exact same thing. Two differnt causes, First time was due to my plugs and the second was due to a couple of boost leaks. Just a suggestion man!:D

thanks, I found out it is a boost leak right out of my IC pipe. It actually cracked open so I gotta get something made. I am looking for driver side IC piping also! Does anyone know if Fmax would just make the driver side IC piping and weld a flange for the BOV??? Just wondering, I am in no rush and would love to have some nice IC piping one of these days! Have a good one!