Here's an interesting dilema...

[downrangecop]

I'll lay this one out as quick and easy as possible. Two weeks ago replaced the starter and did the doghead relay mod. Replaced some fusable links. Truck fired right up. Then it got harder and harder to start (used to fire RIGHT up). Put a 4" lift on the truck in the garage, went to start it up and it took almost a minute. The next day, nothing. It pumps fumes out the tail pipes but no go. So I put in new ac60 glowplugs... Still just spins and spins and won't start.

I know all this beast needs is fuel and compression...and it's spurts heavy fumes out the pipe when trying to start... And it ran GREAT before. Ran great after the long start. No weird noises. Just won't fire up.

So any ideas? I'm running out of hair to pull out.

 

[Midnight Rider]

Have you checked the fuel filter? What about the IP? The fuel return valve could be clogged up.

When you say fumes, do you mean smoke? What color is it?

 

[downrangecop]

Fumes are dark and smell like raw diesel. What's the location on the fuel filters?

 

[Midnight Rider]

The main and I think only fuel filter is located on the firewall in the engine bay right next to the batteries. It's a cartridge type.

 

[downrangecop]

Mine plumbs straight from the frame rail to the fuel pump

 

[downrangecop]

I have an 86 m1008

 

[OL AG '89]

Do you hear the glow plug relay clicking on when you turn on ignition???
sounds like you don't have any heat on the glow plug...... if even one was working the thing would attempt to fire...
have you checked voltage?
search for glowplug problems..... there are several posts that walk through correct steps for trouble shooting or refer to the TM 9-2320-298-20P.... I think

 

[Midnight Rider]

No fuel filter? Well that does not sound good. Sounds like you got a hack job.

You'd best download the resource manuals and look through them. But if there have been changes like that, those manuals might not do you any good.

 

[downrangecop]

I stand corrected. I was going thru the manual and realized that was a fuel filter. So how do yu clean that thing? I read that I'm supposed to be familiar with cleaning it. But no nstructions and I'm doing this off my iPhone in the garage. Downloading the manual takes FOREVER. Anyone explain?

 

[Midnight Rider]

Just drain it and replace it. It's about $30 at NAPA.

There should be a hosed attached to the bottom of it. Just turn the valve and drain it out. Pop it off, put on the new one.

You'll have to prime it.

 

[Midnight Rider]

Here's a pic of the page that shows how to bleed/prime the fuel filter.

Hope it helps.

 

[doghead]

You need to go to a computer, and download the -10, -20 and -34 TMs for your vehicle. Save them on a disk or to your computer.

If you are smelling fuel, when cranking, then you obviously have fuel.

You need to test each component of the GP system. It is all listed step by step in the TM. The engine WILL NOT cold start, without a properly functioning glow plug system.

 

[Samyguy]

could be a vacuum leak in the fuel sys. , letting air in.
Once it fires, will it fire off for the rest of the day?

 

[Shop Rat Fab]

Downrangecop, could you have gotten a bad load of fuel or put gas in it? Raw diesel should be white smoke not dark as described. I'm with Doghead on the properly functioning glow plugs start there.

 

[2deuce]

1st thing I would do is put a meter on a glow plug and see if there is power.

 

[downrangecop]

I'm thinking it's a fuel issue as it started when the truck was parked backwards in the driveway ( I have a steep downsloped driveway) so I'm hunting it down. Gotta prime the new fuel pump when I get up tonight. Gotta love the night shift.