Originally posted by MrFatBooty
Finally, since this is a turbo'd car it doesn't really matter what generation of ECU there is. Once the code is fixed by PROPERLY DIAGNOSING THE OXYGEN SENSOR PROBLEM then it will run fine. If you want to tune the car then ditch your rising-rate fuel pressure regulator, get 450 cc/min fuel injectors and an A'PEXi V-AFC.
Switching to OBD1 just so you can run a chip that isn't even tailored to your setup is pretty pointless--the V-AFC combined with larger injectors can be tuned on a dyno that has a wideband o2 sensor hookup and will yield far better results.
:thumbup: i completely agree, chipping ur ecu is just putting in someone elses idea of power on ur ecu and u lock in their fuel maps, get ur own way of tuning and adjust accordingly to ur engines capability