Why wont my truck start

Tiny
TRUCKFARMER
  • MEMBER
  • 1995 CHEVROLET SUBURBAN
Previous owner said it was running fine then it just shut down like someone had turned the key off its a 6.5 turbo diesel k2500 suburban it has good fuel no air in the lines a remote mounted fuel driver module (pmd) has fuel to the injectors but will not start im not familiar with this engine so any help will be greatly appreciated
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Thursday, May 10th, 2012 AT 9:56 PM

33 Replies

Tiny
FIXITMR
  • MEMBER
How cold is it? Glow plugs working?
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Thursday, May 10th, 2012 AT 10:06 PM
Tiny
TRUCKFARMER
  • MEMBER
Its 80 degrees out I live in the Oklahoma panhandle haven't checked glow plugs yet but will today or tomorrow any other ideas in the mean time?
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Thursday, May 10th, 2012 AT 10:19 PM
Tiny
TRUCKFARMER
  • MEMBER
Would the glows plugs not working just make it die like that tho ugh I've heard lots of talk about the pmd quiting on these engines
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Thursday, May 10th, 2012 AT 10:25 PM
Tiny
ASEMASTER6371
  • EXPERT
The governor ring in the injector pump is a common failure. You can try removing the return line check valve and see if it has metal shavings in the valve. If there is, clean them out put it back together and see if it starts. It may if the valve is clogged.

Roy
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Friday, May 11th, 2012 AT 12:00 AM
Tiny
TRUCKFARMER
  • MEMBER
Ok thanks ill try that tomorrow and see what I can find gotta work late so wont get to mess with it tonite
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Friday, May 11th, 2012 AT 12:04 AM
Tiny
ASEMASTER6371
  • EXPERT
Get back to us

Roy
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Friday, May 11th, 2012 AT 12:09 AM
Tiny
TRUCKFARMER
  • MEMBER
Will do thank you very much for ur input ill let you know what it looks like when I get a chance to check it out
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Friday, May 11th, 2012 AT 12:54 AM
Tiny
FIXITMR
  • MEMBER
Does CEL work? Any codes?
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Friday, May 11th, 2012 AT 1:55 AM
Tiny
TRUCKFARMER
  • MEMBER
What is the cel and where is it located
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Friday, May 11th, 2012 AT 1:58 AM
Tiny
ASEMASTER6371
  • EXPERT
Early system and not much info on the line.

Injector pump is real common on these old units. Governor rings were failing on the old stanadyne pumps left and right.

Roy
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Friday, May 11th, 2012 AT 2:00 AM
Tiny
FIXITMR
  • MEMBER
Check engine light. Should come on when you turn key to on and go out when started. Here's another thing to look at.
1994 Chevy Truck K 2500 Suburban 4WD V8-393 6.5L DSL

Fuel Cut Solenoid: Testing and Inspection
An inoperative shutdown solenoid can cause a no-start condition. Disconnect solenoid harness connector and with ignition switch in the "ON"
position momentarily touch solenoid harness connector to solenoid connector. If a "click" sound is heard, the solenoid circuit is operating
properly. If "click" is not heard, the system should be diagnosed as follows:
1. With test lamp connected to ground and the ignition switch in the "ON" position, backprobe the shutdown harness connector. If the test lamp
does not light check for open circuit form the ignition switch to the solenoid.
2. If the test lamp lights, check the ground circuit between solenoid stud and injection pump cover to see if connectors are clean and tight. If the
connections are not clean and tight repair and retest.
3. If the ground circuit is "OK", remove the injection pump cover. Connect a jumper wire between solenoid ground connector and ground. With
the ignition switch in the "ON" position, momentarily touch shutdown solenoid harness connector to shutdown solenoid terminal. If solenoid
operates, check for internal injection pump problem.
4. If the solenoid will not operate, replace the shutdown solenoid.
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Friday, May 11th, 2012 AT 2:01 AM
Tiny
TRUCKFARMER
  • MEMBER
I think that this is the original injection pump and of it is its got 152000 mile on it
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Friday, May 11th, 2012 AT 2:05 AM
Tiny
ASEMASTER6371
  • EXPERT
The test tree is something you should follow. Fixit gave you a great chart to follow. I have done it so many times and found it to be the pump in the end that I neglected to give it to you. Sorry, I would follow his chart first before condemning the pump.

Roy
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Friday, May 11th, 2012 AT 2:09 AM
Tiny
TRUCKFARMER
  • MEMBER
The lite does work haven't checked the codes I dnt have s scanner
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Friday, May 11th, 2012 AT 3:10 PM
Tiny
ASEMASTER6371
  • EXPERT
Did you check the check valve as I suggested?

Roy
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Friday, May 11th, 2012 AT 3:16 PM
Tiny
TRUCKFARMER
  • MEMBER
Thanks guys and I haven't had time yet got off late yesterday and am working today gunna try and check out all points y'all have suggested tonite when I get off work around 6 then ill get back with you thanks for all your help thus far y'all know alot more about this truck than I do and your help is very appreciated
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Friday, May 11th, 2012 AT 3:58 PM
Tiny
TRUCKFARMER
  • MEMBER
Ok guys I checked the check valve no shavings and the solinoid is working im gunna hook up the other pmd I've got and see if that helps
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Friday, May 11th, 2012 AT 10:40 PM
Tiny
ASEMASTER6371
  • EXPERT
Crack a line at the injector and crank it and see if there is any fuel pressure coming out of the line.

Roy
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Friday, May 11th, 2012 AT 11:18 PM
Tiny
TRUCKFARMER
  • MEMBER
There's fuel but not much pressure just squirts out a lil
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Friday, May 11th, 2012 AT 11:27 PM
Tiny
ASEMASTER6371
  • EXPERT
I still think you have a failed injector pump as I first stated.

Roy
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Friday, May 11th, 2012 AT 11:39 PM

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