It's acting a little wierd. I will be sending it back and they will change it for free, but I was wondering if someone could give me some insight. Basically it has two problems - the SES light does not come on when the car is started and the IAC acts the opposite the way it's supposed to. When I first start it up it goes from about 300rpms to 1200 rpms slowly without the initial burst at start up. Then the IAC stays open forever. It's really loud(sounds like a HUGE vacuum leak) and is totally screwing up my gas mileage!!!! The guy thinks he used the wrong BIN(I think that's what it is) because he used some kind of identification number that did not match up with the label on the back of my original chip. It's not a biggie because he'll take mine and redo the new one according to it, but I was just wondering if anyone could help me learn something from this(besides to do it myself)

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88 firebird formula
350 Vortec TBI
214int/224exh, .471int/.491exh
Edelbrock headers
SIX-speed
Eats LS1's with a 2.73 open rear and 2 1/4 stock catback

My Formula