This has been puzzling me for a while.I was getting a 1286 code that indicates either tac module or accelerator assy was defective. I replaced the module which btw gave the car more throttle response. But my problem is after 4 minutes of driving when car is cold power will drop to where I can bearly hold 20 mph. While still driving at that speed it will slowly get back to normal and be fine until I turn it off. This time around I am not getting any codes at all. any clues???? Can't go racing like this..

 

Very impressive times with those mods.

 

thanks. Have a custom designed cam in now and trying to get back to the track. Anyone have any ideas before I buy a accel assy????