I have an 02GT. When I first bought the Diablo Predator I ran their performance tune and was rich. I had no problems leaning it out by manually adjusting it. My cousin owns a garage and is a bigtime motor head, to be honest he did most of the adjusting. I installed a 75mm TB and plenium so with all the extra air I went up to #24 injectors. Those 2 things did mess up my tune. I contacted Diablo and gave their rep a list of all the add ons I had done and for 100.00 they wrote me a custom tune, emailed it to me, I used an interface and loaded it into the hand held Predator and uploaded it into the car. I did some real fine tunning for a few weeks and I am convinced for what my car is... it could not possibly run any better than it does now. It is so much quicker, an example I can be in second or 3rd gear just taking it easy and stomp on it and it will break loose and spin the tires then hooks up again. That car never did that before. The point I am trying to make is be sure you didn't do something previously that may be making you run rich? By the way... my fuel pressures are still close to what Hayes has published.
How about your CAI? Good luck
Steve
__________________ 2002 Mustang GT, Mineral Grey, Manual Transmission Add ons: New Goodyear Eagle GTs, Under drive pullys, CAI, 373 rear, Dynomax ultra flo exhaust, High flow shorty headers, 2.5 catbacks, BBK 75mm TB and plenium, #24 fuel injectors, Diablo Predator tuner w/ custom tune from Diablo. | 
