I always hear the 03 computer can't be tuned because of the seperate trans computer. This seems like total B.S. to me. So, can it be done or not. Just asking questions.
The diablo predator does support it but it's pretty limited compaired to the later PCM's. Main thing is theres no changing idle speed. That and some of the controls you don't have with throttle rates and airflow tables makes it pretty limited when tuning a bigger cam. If it wont idle at 650 RPM then you can't raise the idle. It looks like recently there is now adjustable rev limit in the template but I haven't verified that it actually works yet. As it sits on a stock block 5.7 a comp 268 or a spartan 114 LSA is about as big as I can go tuning it.