1 - remove negative battery terminal, 2 - remove efi fuse. 3 - Remove stock ECU. 4 - install the new ecu. 5 - re-insatll efi and then the negative battery terminal. 6 - fire it up and leave it to ide for 15-20 mins, 7 - start driving but not boosting over 0.7bar for the first 100-200 miles. 8 - Turn the boost up to desired setting. I noticed AFR was all over the place for the first 150ish miles it was running very rich when driving hence why i kept boost at 0.7 bar. AFR became more steady after the 150ish miles thats when i turned the boost up.