I bought my MPVI pro system from HP tuners back in 2007 and I tuned my engine swapped 86 Fiero with the software it came with .With help from tuners on the forum , I tuned it myself and I was very happy with the results .A couple of years ago , the car spent a year and a half in my garage while I built a custom rear suspension , new intake and exhaust .And then my old laptop died and I was forced to start tuning on a newer laptop .An attempt to transfer all my tuning stuff to the new laptop failed so I had to download the newest software and do a read entire to change the injector constant for my new 42 lb injectors .When I did this , my fuel cutoff changed from the 7000 RPM I had before down to somewhere around 6000 .3 writes later and many test drives show still around 6000 RPM fuel cutoff .I had no problem getting the injector constant to change(did it twice because the first value I tried the car would barely run) so I do not know what is going on .this is my tune