have one stage 1 chip and i come to retire it to put a standart chip (stage 0 Surpris ) but i have problems..... i disconnect the batery ground, i retire the ecu and the chip... but when i put the ecu again the car have electrical failures in the motor and let a injector open etc etc.....
what is the method to change the chip?
why i have electrical failures? maybe i need to disconnect and connect also the group a coil?