Ok so here is what happened. I left a friends house saturday night and got on the car. It pulled really well all the way up the rpm range with no studer or hesitation. I let of the throttle and just cruised for a half mile. Stoped at a stop sign and then pulled out and the car was missing and spuddering then started popping through the cats. I think I burned through a plug wire as they really needed to be changed anyway. Where else should I look? This is the list of the mods done to the car.
Any suggestion would help


- Eagle 4340 Steel 3.48" crank
- TRW 9:1 forged aluminum pistons
- Eagle 4340 5.7" H-beam rods
- TRW piston rings
- Clevite Main bearings
- Clevite Rod bearings
- Crane blower camshaft (214/222, .488/.509, 112 LSA)
- Mailorder tune by Bryan Herter from PCMforless
- Fel-pro gaskets all around
- Melling Oil Pump
- Hypertech 160* Thermostat
- Vortech S-Trim Supercharger
- Vortech 2.75" pulley (10 psi peak)
- BBK 52mm Throttle Body
- Crane HI-6 Ignition box
- T-Rex Inline Fuel Pump, 50gph
- Bosch 42 lb/hr injectors
- Edelbrock 1 5/8" Headers
- Edelbrock 2.5" Y-Pipe
- Flowtech 3" Manual Cutout
- Borla 3" catback
- B&M 4L60E Shift Improver
- ET Tranny mount
- B&M 2400-stall Torque converter
- Spohn Driveshaft Loop
- Competition Engineering subframe connectors
- Competition Engineering Strut Tower Brace
- Autometer boost gauge
- Autometer Air/fuel gauge