I suspect my line pressure is not where it should be and would like to datalog line pressure if I can. All I found was the EPC solenoid pressure (GM.tfmprs) that maxxes out at 90 psi. I believe line pressure goes from 55-230. Or do I math my way from one to the other? Or should I compare GM.tfmprs to a mechanical gauge screwed into the test port? I'm really hoping for a laptop solution here as we're about to head out with the truck and I can capture some good logs.
Editing to add this is for my 97 in sig with 411 PCM.