For the last week or so, once or twice a day, I will shut my key off and my 1994 ctd 4x4 5spd w/ground fuel plate and gauges keeps running for a few seconds then shuts off. The longest it kept running was almost a minute. I don't know what the problem is but I would like to get it fixed.

 

Its may be the Alt. starting to go [ diods going bad ] and leaking voltage back the other way , or relay contacts starting to burn and not opening.

 

Sounds like your starter contacts are worn out and sticking.
Fix this as soon as possible as it can lead to the shutdown solenoid overheating and frying, $200 plus. It can also burn up your wiring and start a fire.
Contacts are available at any automotive electrical shop or from here http://www.fostertruck.com/dodge/starter%20faq.htm
until you get it fixed be prepared to disconnect your batteries or pull the connector to the shutdown solenoid if the truck should run-on for more than a couple minutes.

From the same website:
Q: How do bad starter contacts cause the engine to keep running when I turn off the key?
A: The fuel shutoff solenoid is actually two solenoids in one. One coil is very strong to pull the linkage open when you hit the starter to let fuel flow. This first coil produces lots of heat and is intended for short use. The second coil is smaller and has just enough power to hold the solenoid open for running. It does not build up heat like the stronger coil.

The stronger coil is wired in with the starter so when you hit the starter the fuel solenoid opens and the engine starts. When you let the key return to the run position only the second smaller coil is needed to hold the solenoid open.

When the worn starter contacts hang and stick closed the stronger first coil stays energized along with the starter. This causes heat buildup after a short time and can actually catch fire if the battery isn't disconnected quickly.

 

I replaced the starter because it would hang up and the truck wouldn't shut down. It has only done it when the truck runs for a while, like 15-20 minutes. I don't think it is the starter.

 

The only other choice would be the fuel solenoid hanging, right?
I don't know, but need to, because I have a 12v now.

Thanks,
Chris

 

That definately sounds like the fuel sol. hanging up. When it happens again, go under the hood and pull the sol. rod/lever down. If its still up w/the key off, thats your culprit. May need to work it a little, maybe spray some WD on it. Inspect the rubber boot as well.

 

Fuel shut-off solenoid can be located here http://www.dodgeram.org/tech/dsl/Fac...ocations-l.gif

 

I have had electric fans and blowermotors cause the same problems on big trucks &pickups. Just somthing else to look for.good luck.
Dale