Originally Posted by dieterschmied
I have a 1989 six cylinder with fuel injection and two tanks. Yesterday, the truck just died on the expressway like it lacked fuel. It sputtered and when I was pulling off the road it came back to life just enough that I felt is was a fluke until I passed the next exit and then it died for real.
I could crank the engine and it wanted to start but it just died when I released the starter switch.
First, I would like to pick up a simple wiring diagram of the fuel supply system so that I might understand how to diagnose the problem. Are there any on line?
It would probably be easier if I had only one tank. I don't need two tanks, so what is the downside to removing or disconnecting, say, the rear one? Is there anything that I should be concerned about?
I stuck a probe into the schraeder valve one the fuel line behind the engine and I got fuel to come out but I can't determine the pressure. I suppose the fuel pump only comes on for a few second is the engine does not start; is my assumption correct? Does that apply to all of the fuel pumps?
Ford put two tanks on there because the gas mileage is so terrible you need both of them to go any distance...LOL
no need to figure it out... if you know one you know both...they are wired in parallel... it is very simple