Ok, I've looked and can't seem to find any answers with a search so maybe someone has some ideas. I've got an 89 camaro with a t5. I swapped in an L98 longblock about 6 months ago and I've had this problem since. When the car gets warmed up and i'm cruising along in 5th gear and hit the brakes and go to downshift at the same time the car dies. I've replaced plugs, cap, rotor, wires, CTS, IAC, injectors, knock sensor, and spark module along with a chip from TBIchips. Other than this problem the car runs great and it doesn't do it if I only hit the clutch or the brakes, just when I hit both. Any ideas?

thanks,

Jeremy

 

I would check your timing.