1996 K2500 suburban shut down

[OldIron1953]

1996 K2500 suburban 6.5 TD. Replaced FSD and relocated behind front bumper with new FSD pigtail harness. Ran for 20 minutes and shut down tried to restart, lift pump running but no glow plug light. Waited 5 minutes, got glow plug flicker, it restarted and shut down again after a few minutes. Repeated. Injection pump is several years old but has less than 20k on it.

 

[DieselAmateur]

Welcome to the forum, give us some history of the truck, any other mods, fill out your signature with what's been done to the truck, helps us diagnose specific to your rig.

There's numerous threads on here with no start issues, I'm linking you to one that was relatively recent and covers all of the bases when it comes to a no start condition. Read through it and see what applies to you and keep us posted on what you come up with.

‘94 Hard Start (video)

I’m not there. Sounds like air in the fuel lines. What say you?

www.thetruckstop.us

easiest and quickest thing to do- put clear tubing on IP return line. Verifying whether you're getting fuel to the IP or not will help determine whether you have a fuel supply issue or electrical issue

 

[OldIron1953]

Thanks!
I also recently replaced Fuel Shutoff Solenoid because it was acting like a fuel issue. I came close to gutting the old FSS but replaced it instead. Will try clear fuel return line when I get time.

 

[NVW]

Passenger back side of intake manifold can have 2-3 ground wires, remove them and shine them up.

Not sure if 96 could be a cross between OBD1-2 for the ECM, it can be with the cooling system.

My 95 FSOS (fuel shut off sol.) fuse would lose contact and shut the truck down. Newer (OBD2) ran the fuel pump via the ECM.

 

[Will L.]

“Lift pump running”.
do you mean it was making noise OR
You opened the water in fuel drain/ bleeder screw and fuel came out OR
You hooked up a fuel pressure gauge?

 

[MrMarty51]

Welcome to the forum

 

[JMJNet]

Try to temporarily eliminate the PMD extension by hooking it up to the original harness directly.
Just making sure that extension cable is good.

 

[dbrannon79]

Try to temporarily eliminate the PMD extension by hooking it up to the original harness directly.
Just making sure that extension cable is good.

just keep the heatsink on the PMD or it can go fubar in moments!