TunerPro User Forum

I am tunning a evo3 when i finish tunning and do the chip all is ok but next day the car start running rich and I reset the ecu *take the batery and put it againg* the car work ok Inuse the car and hapen againg pls need help

Pls need help I am tuning a evo 3 and when I tune the car and burn the chip the next day the car do no work all the tuning do not work , then I take the battery off and conected the car start working ok and I do 3 past on the race track and the car start giving problems take the batery off and on ag...