Baught a 2004 gt with many Mods and no cats however I thought that there was no MIL eliminators in place because my serve engine light is on well I jacked up the car and looked and noticed that I do indeed have eliminators installed so I took off my battery cables to reset the computer and after awhile the service light came back on so I had it checd out and the shop confirmed that my problem was indeed the Catylatic Convertors or lack there of. Has anybody had this problem where they took off all four CATs and installed MIL eliminators and the service engine lite still shows up. Heres the MODs that came with it when I bought the car. C&L intake with 75mm Throttle body, MAF, 32 lb fuel injectors X pipe No Cats, C&L Plenium, Performance intake, Stage 3 clutch w/short throw shifter, Flowmaster Exhaust, I think it has Bigger gears Also, not sure though.

Hurstmeister sent me from Corral Forums and said I should look up Brian with the handle EFI_Unlimited says maybe he can help with a retune or if anyone knows of another shop in the area of Brandon or Riverview that I can take it to so I can tune out my O2 sensors.

Please help if some knows what might be the problem
Thanks