there you go your car is running like crap cause you haven told your ecu that you have injectors putting in more fuel! Thus your ecu opens up for the 370's cc injectors worth of fuel, when you are giving it 480cc's worth of fuel. I recomend that you install atleast the safc asap so you can bring down the correlation. After that if you have more problems then I would look at other things, but I gauntee thats your problem right now.