I had the same problem when i first put on my hi-flow cats. When I accelerated in mostly 2nd gear, the car would seem to stall, then pick up and go. Also, shortly after I installed the hi-flows, the check engine light came on for awhile and freaked me out, but then it went off. It doesnt do this anymore, so what i think it was was the computer trying to adjust to the new setup and adjusting timing. Have you recently installed and of your mods? However, i think it may be timing.
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Blueneonman - '95 5.0L Mustang GT Convertible | K&N Drop-in | FMS 9mm Wires | Hollow Cats | Flowmaster 2 Chambers | Subframes | 6-pt Rollcage | 14deg Timing | Coolest Neon Lighting on a Mustang EVER!
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