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Discussion Starter #1
I bought a '02 f250 with 238k miles a few weeks back. Started good when looking at it. Drove it home about 3 hours and the next day it didn't want to start. I have driven it once since bringing it home. Oh yeh, this is my first diesel, but I have been wrenching on gassers for over 20 years. Just never messed with a diesel. I looked nearly two years to find a clean 7.3l I could afford.

List of things done and why:

- checked fuses
- replaced ICP - was leaking oil
- replaced IPR - cause I had one
- replaced CPS - cause it so common
- replaced EOT - had fault code for reading too high
- drained filter housing and cleaned
- verified fuel is filling filter housing
- verified GPR is working with DMM - around 10.5v and better when cranking
- verified voltage to glow plugs
- ohmed glow plugs - all .5 - .6
- ohmed injector solenoids - most were 2.6 , couple were 2.7-2.9
- pulled valve covers and inspected UVCH
- checked UVCH connectors - were tight (plus did the .50 repair for good measure)
- topped off HPOP reservoir - was low
- pulled GP's - all 8 looked near new
- had batteries tested and charged - in case my load tester was failing me

- cylinder leak down test (done dead cold cause it won't start!):
all done at top dead center on compression strokes:

......... off top of my head results ranged - 50%, 55%, 58%, 60%, 40%
......... - and had one at 80% (#8)
results sucked but it was completely at ambient temp. (besides it did run)


I am nearly at my wits end. I am just not sure where to head next. I thought I may install a fuel pressure gauge and see what that is. Anyone have any ideas of what (and how to) I can test next? :dunno:
 

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How low was the HPOP?

Wondering if it's the HPOP or you have a HPO leak somewhere.

Is there any oil in the valley? (Specifically the front?)

Oil lines are good and clean?

Crank it again and check the HPOP Res again. If it's low again I would say you have an Oil Pump issue.
 

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Discussion Starter #3
The HPOP reservoir level was about half. There is oil in the valley. I have oil up front as well.

Ill try cranking again and take another look in the reservoir.

ToMang...... are you referring to a possible problem with the HPOP or the low pressure oil pump? Thanks for your help!
 

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Sounds to me like you definately have a HPO problem.

Could be bad O-rings in the HPOP,
Could be the O-rings are bad on the HPO lines,
And the HOPO could be weak, and not giving enough presure to fire the injectors.

The HPOP needs 500PSI just to start....and up to 3000PSI to run the injectors. If the pressure is to low, they wont fire.
 
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