said by Anonymous_:
I Tired Premium fuel and the code went away. That was for the long trip.
Tired with mid-grade fuel again code came back. interesting. $75 worth of fuel down the drain. I think the PCM was tunned for Premium fuel. Huge possibility. since it had 5 previous owners.
I just going to use up the tank and filler up with Premium chevron fuel.
If it has a tuned PCM, it WILL need premium fuel.
I would contact Miltzy motorsports (most likely the ones who tuned it) and see if they will send you a stock one aback in exchange for your tuned one.