I have been tuning my MAF after swapping a 3500 in a 2005 Grand Am, and for some reason, it seems like the MAF cal won't do anything to the fuel trims. The MAF cal definitely worked up to a certain point. once I got it to within +/- 5%, the Cal seemed to make no difference, no matter how much I change it. Also, I've been having hard starts, where it takes 6-10 revolutions to start, but idles fine when started. My friends Grand Am starts in 1-3 revolutions. Could somebody please take a look at my tune and a log, and see if I'm missing something? The only thing not stock (besides the swap of course) is Trailblazer #28 injectors and a 65mm throttle body.


Wierd MAF Issues.hpl
Grand am.hpt