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1999 chevy suburban 6.5 turbo diesel

S

SUBURBAN99

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I did a complete frame off with new rebuilt motor & tranny . All new suspension everything new. Ran great put about 8,000 miles on with all the oil changes and filters. i has a the first PMD go out which was on the pump. The place that did my build said if I relocate the PMD it would cancel my warranty. after the original PMD failed I unpluged the PMD leaving the old one on the pump relocated it. Everything ran great. The other day I went back through all my grounds to make sure theu had metal to metal contact beacuse once in a while i would turn the key and nothing would happen. I replaced the ingition switch still the same situation. So after redoing the grounds the engine was running and then stop like turning of the key. it stated and then would turn off. now nothing the starter just cranks but it will not fire.plenty of fuel up to the high pressure pump. lossen one injector line at the injector no fuel dry as a bone. changed out three different PMD's that are brand new out of the box same situation. pulled the solenoid fuel shut of used anther one without the plunger no change. also plugged in the PMD right at the pump no change. any help be great. I'm thinking my high pressure pump has failed.
 

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Where did you get the pmd extension harness?

Sounds like a loose or corroded connection somewhere to me..

What is under warranty, maybe let them handle it if they are going to dictate what you can and can't do...
 
From Leroy diesel and one from Quadstar and the third one Thourbred Diesel. The warranty will dictate what the want me to do they are in Midwest I’m In Oregon
 
Any codes?
Bad pin out from the IP Harness to the PMD is possible. Have you checked voltages at the harness?

Test to determine working PMD Harness
Pin outs on the PMD Harness
Pin Wire Color Voltage Source/Connection
A Light Green .05 VDC ECM
B Red 0 VDC Fuel Solenoid
C Black 0 VDC ECM
D Pink 12 VDC Underhood Fuse Fuel Sol Fuse (Connects to Shut Off)
E Red 5 VDC ECM
F Black 0 VDC Fuel Solenoid

Here's a couple of write ups from past trouble shooting articles that will help. Note: FSD and PMD are the same, article will explain it. I think TurbineDoc might have written at least one of them up.

With pressure at the IP inlet, the LP is working (I see the OPS extension in the picture). With three swapped PMD extension cables and rotating out PMDs, it certainly leans towards a possible IP replacement since there's a threat of voiding a warranty.
Whoever rebuilt the engine may need to be the ones to address about the issue no start / shut down issue, but at least you'll have a better idea of what's going on and just start shotgunning part at it.
 

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Thank you Im getting ready to pull the engine harness apart luckily I did a new engine harness from Leroy diesel so the harness on top. Easy to get to. I appreciate the information. I will keep you all posted
 
Pressure at the injection pump is 10 PSI. I installed a raptor lift pump when I did the new build. I spent $35,000 on the total build.
 
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