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

You can rule out the solenoid by pulling it and removing the plunger, refit it without the plunger and try it, bare in mind if it does start you'll have too stall the engine or suffocate the air inlet to stop it :)


Banks Monster Ram inlet-BHAF-Pensecola 50hp injectors-Raptor 150 lift pump-GDP Big lines-Banks heater delete-Smarty-BD low pressure light........for now :)

Hey I am having the same problem where is that solenoid located at

It's rare but it might have sheared the keyway in the IP drive flange?

I had a fuel leak for a minute and fix it it the other day then then I left the truck running went in to a friends house came out and it was dead there was fuel still in the ip and but I cracked an infection and no fuel when starting

Sounds like IP seized up?

Could still be FSO though?

So I jammed a socket to bypass the solenoid and it was giving me some fuel when I cracked the injectors but I am not sure if it's enough I sprayed some either down there it started for a sec then died and I didn't feel like spraying more because it didn't sound all that great

Thats good news,you can use wd40 for safe alternative to starting fluid.

Crack an injector line loose to help purge air faster-tighten it up when the truck starts and stays running.