[91GTturbo]

I'm assuming your car's still fuel injected. If so, the computer is in an open loop mod until the car reaches a high enough temperature, once it does I guess the car's running fine, right? What size injectors, heads, cam, etc. are you running? Having a chip burnt would probably help, although I wouldn't just have one burnt anywhere. Find a shop that makes dyno pulls and has a wide band O2, that way it can be burnt exactly for how your car is running.