Ok, so my dad had a procharger 8lb kit installed on his 2002 4.6l in New Jersey several years back, and recently gave me the car. I am in CA, and no doubt the car was tuned for 93 octane gas, and in CA, all we have is 91. The car is currently being run with an Autologic chip, and I'd like to switch it out to a Diablosport since most of the tuners here prefer to tune on those. Anyways, my question was, can I simply remove the chip and flash the ECU using the Diablosport predator, or do I have to change the ECU back to stock first? Will just removing the current Autologic chip turn the ECU program back to stock, or is there something more I have to do. Also, does Diablosport have custom pre-made maps that I can run on my car with the the procharger kit and 91 octane until I get it dyno-tuned? Any advice you guys can offer is appreciated. Thanks.