[arveetek]

Firefighter,

Yes, you can do away with the glow controller, but use a relay, don't hard wire them directly to the switch itself. The glow plugs can pull well over a 100 amps when warming up the engine, so you would burn up a standard switch in no time. Use a Ford style starter relay, with the wires from the glow plugs going to one large terminal, battery cable on the other large terminal, and a 12 volt positive wire going from your in-cab switch to the small terminal on the relay. The solenoid should ground through the body, so mount it to the firewall or frame. When you start the truck, push and hold the switch on for about 10 seconds, then start the engine. It's best to use a momentary, spring-loaded style switch so that you don't forget and leave the plugs on and burn them out.

The stock square fuel filters used on the '84 to '88 trucks were a single-filter system. They used a single filter on the firewall. The '82-'83 trucks used two round spin-on filters, a primary on the firewall and a secondary on the intake manifold. The '89 and later trucks used a round, canister style filter mounted in the "V" of the engine. If you have a square filter mounted directly to the intake manifold, it sounds like your engine came from a van, and I don't know if they used a primary and secondary filter or not.

There will be three plugs on the injection pump: the one on the passenger's side towards the front is the fuel cut-off solenoid. 12 volts to this terminal keeps the engine running, removing 12 volts shuts it off. The other terminal on the passenger's side towards the center of the pump is the HPCA, or housing pressure cold advance. Basically, when the engine is cold, the timing is advanced about 3 degrees for easier starts. This is controlled by a temp. switch on the right rear head. The third terminal on the pump is on the driver's side and is actually mounted to the fast idle solenoid. It physically pushes down on the throttle lever and bumps the idle up during cold starts. This is on the same circuit as the HPCA and the two can be wired together.

One of the sensors on the engine you found is for the HPCA, and the other is probably for the glow plugs, to prevent them from coming on when the engine is warm. I can't recall at the moment which is which.

Casey