6.2 No Fuel At Injectors
#1
02-09-2012, 06:40 PM
6.2 No Fuel At Injectors
Hi guys, long time reader (unfortunate) first time poster:
1985 GMC Jimmy w/ the factory 6.2 Detroit Diesel, bone stock. 127k miles, no major repairs or overhauls except for a new starter, batteries and alternator within the last 5k.
The truck had always run great, but was sitting at at my parents ranch for the last 2 years since I got a new truck. Got it into town, tried to start it, batteries were done. Bought brand new batteries, and just to make sure I had good fuel, I hooked up a fresh jug of diesel to the firewall filter with a 12v elec lift pump and two filters (diesel>in line filter>pump filter>elec pump>stanadyne firewall cannister filter> IP).
After a few minutes, it fired up great, and I ran it for about 15 minutes until I accidentally burned up the diesel in the jug faster than I thought. No big deal I thought, until the next day when I tried to re-start it with new diesel. Primed the firewall filter, cranked and cranked, and nothing, no smoke. Yesterday I pulled the injector lines, and cranked in 10 second bursts every few mins w/ pedal down until my batteries died (and not a drop on the injector lines). Thought it might be the solenoid, but today I could hear it click, but I went ahead and pulled the top of the IP anyway. This is what I saw, which looks completely normal (full of fuel, I was getting fuel out of the top of the return, etc.) https://i.imgur.com/FDZ8N.jpg
Tried cranking again with fresh batteries and the cover off, just to see if the level dropped at all, and it doesn't look like it moved at all (bowl still full of diesel and the injector lines are still dry). This is driving me crazy - could the IP just really fail that quickly, from running fine to not even pumping a drop w/ disconnected lines? Hopefully I'm overlooking something, but I need some expert help from the folks on here. Help!
Thanks,
Chris
1985 GMC Jimmy w/ the factory 6.2 Detroit Diesel, bone stock. 127k miles, no major repairs or overhauls except for a new starter, batteries and alternator within the last 5k.
The truck had always run great, but was sitting at at my parents ranch for the last 2 years since I got a new truck. Got it into town, tried to start it, batteries were done. Bought brand new batteries, and just to make sure I had good fuel, I hooked up a fresh jug of diesel to the firewall filter with a 12v elec lift pump and two filters (diesel>in line filter>pump filter>elec pump>stanadyne firewall cannister filter> IP).
After a few minutes, it fired up great, and I ran it for about 15 minutes until I accidentally burned up the diesel in the jug faster than I thought. No big deal I thought, until the next day when I tried to re-start it with new diesel. Primed the firewall filter, cranked and cranked, and nothing, no smoke. Yesterday I pulled the injector lines, and cranked in 10 second bursts every few mins w/ pedal down until my batteries died (and not a drop on the injector lines). Thought it might be the solenoid, but today I could hear it click, but I went ahead and pulled the top of the IP anyway. This is what I saw, which looks completely normal (full of fuel, I was getting fuel out of the top of the return, etc.) https://i.imgur.com/FDZ8N.jpg
Tried cranking again with fresh batteries and the cover off, just to see if the level dropped at all, and it doesn't look like it moved at all (bowl still full of diesel and the injector lines are still dry). This is driving me crazy - could the IP just really fail that quickly, from running fine to not even pumping a drop w/ disconnected lines? Hopefully I'm overlooking something, but I need some expert help from the folks on here. Help!
Thanks,
Chris
#2
02-09-2012, 06:47 PM
Running the injection pump out of fuel scars the inside (fuel is used to keep the innards lubed and cooled). It's a very likely chance you burned it up 
, but the only way of telling is have the pump tested at a shop that rebuilds those pumps.
, but the only way of telling is have the pump tested at a shop that rebuilds those pumps.
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