I have a '93 3500 ram that won't shut down when i turn the key off!! Any ideas what is causing this??

 

is the truck still running? Do you have to shut the fuel off manually?

 

sounds like the rubber tip on the shut down solenoid has gone MIA. you're gonna have to manually shut it off using the small lever on the side of the pump, just below the high idle screw.

 

Fix your torn fuel shutoff solenoid plunger...
https://www.dieseltruckresource.com/d...d.php?t=117593

A link to the sticky

 

I like the tractor way(pull to stop), remember these things came from generators and tractors.

 

The same thing happened to me this past Friday on my 93. I have read that this usually happens when you crank the fuel screw in (such as my case). The added pressure due to turning the pump up makes it difficult for the shut down plunger to do its job. Also, just pure age can lead to the plunger tip to tear. I knew exactly what it was as soon as I turned my ign. switch back to the off position and it kept running. I had to use the shut down lever. More than likely the fuel shut down plunger is torn. I did as the "sticky" said under fix torn plunger and had my unit going in around 45min. You can find my thread from this past Friday. Another member was very helpful and posted some good advice. Hope this helps.

 

Yep, an intercooled truck with stock injectors and a cranked pump is asking for a blown solenoid.

 

I've seen a few trucks do it when they're stock.

Replace the shutdown solenoid...

 

Yep its the shut off solenoid. It happened to me after i turned my fuel screw up and now i have a pull cable hooked to the manual kill. Its like a tractor now, its pretty cool.

 

Only down side is you have to sit in the truck and wait for the egt's to come down under 300* or risk coking the bearings.

ASK how I know

I had the rubber tip completely removed from my plunger...Even with the pump turned to runaway it still kills the engine.
Now I set my timer and walk away knowing the engine will cool down AND shut off...

 

x2 on all of that.

 

Thank you all 4 your quick replys but i turned it into the shop this morning 2 let them deal with it!!

 

they must love u :-D

 

haha x2 on that ramit. My truck goes to the shop for NOTHING. I do my own work thankyouverymuch!

PS- cable baby here too. I leave it in the off position as theft deterrent though if someone really wanted to steal my truck they'd be pretty hard up.

 

Yeah you know diesels are more expensive to work on because it costs more at the pump. Also its hard to find a mechanic that actually "knows" diesel trucks, because they are built different than gas cars for a reason.

Yeah if somebody wants something bad enough they will get it no matter what you do...almost.

Let me know what your mechanic says, i'm interested. You may have a decent one :-D (if he tells you that you need a new pump) get another mechanic.