TheDjost starting issues

[TheDjost]

I had the same problem. Stalling 25 to 30 seconds after a cold start. It did it everyday for 2 weeks. I took the piston out of the fuel shutoff solenoid and it hasn't stalled since. That was a week ago. I just took out the piston because I was too lazy to do a proper voltage test on the solenoid to check if it got enough power to open fully. No problems since, but I haven't run it all that much since I'm on vacation for the holidays. Now I'm changing the glow plugs, the controller and the harness. I'll probably test the solenoid when I'm done with that.

 

[TheDjost]

Ok, seems that the problem wasn't with the fuel shutoff solenoid. The engine started acting up again last week-end and this week. In the last couple of days, It's been hard to start, but as soon as it catches, it runs good. Sometimes after 30 seconds, it would just die, but start right back up. If I left it for 10 minutes, like picking up the kids at daycare, it would need 10-15 seconds of cranking to start. Seems that the problem is still fuel related. Last week I changed the glow plugs, controller and glow harness. This week I changed the fuel filter. I don't have a fuel pressure gauge, so I just went ahead and replaced the lift pump also since I had one on hand. Now I have good flow at air purge and water drain. I can hear the LP running when I turn the key, and when I stop cranking, it keeps going 3 or 4 seconds until oil pressure drops back to zero. The starter spins the engine fast, but it won't smoke or cough like an engine that's too cold or too slow to catch. It's just not getting fuel. I even tried cracking an injector line to check for fuel and got nothing. So that means that I may have a bad FSD or a bad IP. I'm going to take the FSD out of the bumper and try it direct on the IP harness to test if the extension is the culprit. If it still won't start, I'll have to order a PMD as I don't have a spare.

I'll post back with results later.

 

[Turbine Doc]

Hey just in case this turns out to be a lengthy thread and rather than try to keep track of 2 different vehicle troubleshootings in same thread I created one here just for this event.

 

[ak diesel driver]

I had a pmd in my plow truck do the same thing. New pmd problem solved

 

[TheDjost]

Sure, no problem. Thanks. I posted in the other thread because other members wanted me to keep them up to date on the issue.

I found my problem though: It was the PMD extension harness. The wetherpack seal was not perfect an moisture got in th connector in the bumper, resulting in some corrosion on the PMD pins. I cleaned them up and put some OXGARD conductive paste on the pins ( a VERY small amount, with a toothpick), dielectric silicone on the weatherpack gasket and it works. I will be changing the extension harness anyway, just to be safe, but this will keep the truck running for now.

You can add me to the victims of the cheap chinese made parts sold on ebay. Although the vendor is not too far from me, everything points to cheap chinese copys.

 

[buddy]

Glad you found your problem. One of those things that often goes unlooked when placing the PMD exposed to the elements. Hopefully you weatherized the PMD to the heatsink as well, with a bead of caulk or silicone around it.