I just swapped my 91 from a 5.7 tbi to a 7730 tpi and it is throwing a code but, I do not have a program to monitor that ECM......what is a good program to monitor the 7730 error codes and tune? I am also running into a problem....it is throwing that code which I'm not sure about yet but acting very peculiar...getting spark and my fuel rail has pressure but, will just turn over and over with only sputering once in a while. I finally did get her started but over 3000 rpm under load the power just dies and she will eventually stall.......and good luck getting her going again.

 

what codes do you get when you jumper the aldl connector ?

 

only code 12