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1st Gen. Ram - All TopicsDiscussion for all Dodge Rams prior to 1994. This includes engine, drivetrain and non-drivetrain discussions. Anything prior to 1994 should go in here.
I have a 91 d250 12v, I have replaced the ignition and fss, truck will not turn off by key everything else turns off but motor stays running. Rack is not stuck either, any thoughts?
Pull the plunger on your FSS. Probably have missing rubber tip.
If he replaced it, not likely. How ever, if the tip of the old FSS is lodged in the chamber, it could hold the plunger open. Other possibility: Power is still going to the FSS even with the switch off. Pull the wire to the FSS and see if that shuts it down.
If he replaced it, not likely. How ever, if the tip of the old FSS is lodged in the chamber, it could hold the plunger open. Other possibility: Power is still going to the FSS even with the switch off. Pull the wire to the FSS and see if that shuts it down.
When the wire is pulled off it still stays running
Did u use an aftermarket FSS or a cummins one? There is a big difference. Pull the positive battery cable off the battery after you turn the key off so you can rule out a short to ground.
There are 2 wires connected to the FSS, one is power the other goes to a thermo switch then to the KSB solenoid. Make sure you are pulling the correct wire. Otherwise, I suspect debris holding the FSS plunger off the seat. As far as I know, that is the only way fuel can bypass the cutoff circuit. Unless it's not fuel but oil entering the intake air stream from say a turbo seal, head gasket, rings, or valve stim.
There are 2 wires connected to the FSS, one is power the other goes to a thermo switch then to the KSB solenoid. Make sure you are pulling the correct wire. Otherwise, I suspect debris holding the FSS plunger off the seat. As far as I know, that is the only way fuel can bypass the cutoff circuit. Unless it's not fuel but oil entering the intake air stream from say a turbo seal, head gasket, rings, or valve stim.
is it possible that I’m replacing the wrong one? I’ve replaced the one on the pump with a single wire, is there another close to the block with the 2 wires?
No there is only one wire connected to the FSS on the 89-93 12V motors.
What I’ve been replacing is circled, what is the other solenoid with the red x I’ve been told that that’s the shutoff and the one circled also so which one?
This is a tool I fabricated to remove the FSS. A chopped and ground 15/16 offset box wrench. It works fine on my truck, but others said it won't work on theirs.
