[RedEye]

I would find out what the octane effect is with the injector cleaner. If its solvent based it could slightly reduce octane, but my guess is that it probably increases octane just slightly (causes fuel to burn more slowly). Normally when I take on really high octane (have a 331 stroker with Holley DP) such as leaded 110 octane racing fuel, I can lose as much as 200 rpms on idle. The engine will idle down to 450 or so when I'm normally between 650-750. If I get a tank of 'bad' gas at the normal premium pump it'll do the reverse. I don't know how well this will be expressed with FI, but I would ad a few gallons of minimum octane fuel and stand by with more boost if ping develops.