I have an '85 pickup that is giving me fits with the fuel system. I'm almost certain that it's the AFM. I had read a thread on here that explained a way to check function of the AFM with a multimeter, but apparently I pushed my idiot button that day and didn't bookmark it. Does anyone know what that test was? I believe it involved testing ohms. Second, can anyone tell me what the voltage should be going back to the fuel pump? I have been unable to find any specs on this at all. I know it's more than what I'm getting because the pump isn't pushing any gas through at all. Any help is appreciated. My truck has been down way too long. I'm majorly jonesing to go off-road.

 

Hmmmm, well do you have an FSM or an online manual? Everything is in there. I would visit 4Crawlers website and I'm pretty sure all your questions will be answered there.