How much fuel ?

[mechted]

so my brother's 88 C20 came home on the back of a tow truck today, wont start.

how much fuel should we be seeing coming out of the bleed port while cranking a 6.2 to bleed the fuel system? it seems like only a small amount is coming out, probably take about 1-1.5 minutes of cranking to fill a 12 oz jar... is that low output? or is that ok? (yes, have the pink wire pulled, no air bubbles yet)

next step will be cracking injector lines... oh what fun

 

[kennyw]

It should be a steady steam with no air. Once the filter is bled then you move onto cracking the injector lines.

 

[mechted]

yep, thats what it was...

cracked injectors and got fuel at 7 cylinders before the batteries were too drained to continue...
so it doesnt appear to be a fuel issue

 

[mechted]

ok, so

fuel at all injectors
fusable links good (continuity to all 8 cylinders from GP controller)
i can hear the GP controller cycling
pulled 1 glow plug and its good (7 replaced 2 years ago w/ Kennedy quick heats)
fuses all good
cranking speed is good
fuel return lines look good (have not tested)
tank no build-up of pressure/suction

it sounds like it wants to start, but it just wont catch.
truck was driving fine (50 miles on highway) parked it, came back 2 hours later and it wont start. has 1/3 tank of fuel, so it shouldnt have picked up an air bubble
engine has about 215k on it, air, fuel, oil filters replaced within 5k miles

anyone got any ideas? im stumped

 

[kennyw]

To test the glow plugs you just need a test light. Hook the clip to the positive terminal of the battery then touch the point of the test light to the tip of the glow plug (with the wiring removed). If it lights up the GP is good, no light and its bad. Those Kennedy quick heats don't really last all that long from my experience. I had 3-4 of them burn out after a few months and went back to the AC 60G's.

 

[mechted]

you sir, know your $hit

4 bad glow plugs: #1, 3, 6(swollen in place/known non-operating), 8 = truck wont start
replaced #1,3,8 and she fired up after about 20 seconds of cranking

thanks a lot for the help