Thread: Diesel fuel to injectors problem

I have heard that there is a small filter on the inlet side of the injector pump. This may need attention.

Thanks ajhfc1953...I'll check it out!

first up are you getting fuel out of the bleed screw on the injector pump.

if you can manually prime fuel to the fuel filter bleed and then to the injector pump bleed and you are getting fuel without bubbles in it then the problem is not the lift pump strainer (at least for getting it to idle, full power might be a different story)


once you have fuel at the injector pump bleed if its been sitting for a while unprimed then all you need to do is set the full fuel position (hold the accelerator flat to the floor) set the fuel position to run (make sure the electric cut motor allows the fuel arm to move to the run position and isnt hanging up) and crank it.

Initially crank it with all 4 of the injector unions cracked off. then when they start to spit fuel tighten up 2 of the unions (1_4 or 2_3) and go again, it'll start to try to run and if your lucky will run, you should then shut it down and tighten the unions. you can tighten the unions with the engine running but be careful of the fuel its under pressure.

Thanks for your comments. They were very instructive.

Background:
The initial problem was that it wouldn't shut down with the key.

I left the vehicle at a friends property and couldn't get back to it for 6 months as I was touring. From what I've been able to ascertain the son of the friend tried to get it going. Now I don't know if he was successful or not, but when I returned to it, the battery was missing and there was one there out of one of the 6x6's. It wouldn't start for me though it had always been a non issue beforehand.

Current:
I tried yesterday to crank it with just one inlet line open, and with full throttle, and it wouldn't fire.
Someone today suggested that the timing belt might be broken. I am not a good mechanic so I wouldn't have the knowledge to know that just from listening to the sound of the motor cranking over. I can tell when something is not right, but not necessarily why!

So if there is a problem with the high pressure pumping side of the injectors, how might I address that?

Cheers
Jack

Be careful about taking any more advice from the guy who said the timing belt may be broken - (it has a chain)

In case you need to find out about the filter mentioned above anyway ...

There's a photo and instruction from post#26 (IIRC) in the following tread

http://www.aulro.com/afvb/isuzu-land...pump-died.html

"search" can really be your friend on this site

Originally Posted by 87County

Be careful about taking any more advice from the guy who said the timing belt may be broken - (it has a chain)

Or the one who says it has a chain (all gears!).

Sounds to me as if the electric stop/run gadget is not working. May be other issues if someone has been messing with it!

John

Originally Posted by JDNSW

Or the one who says it has a chain (all gears!).

...
John

quite right JD, brain in neutral I'm afraid - must be wearing out or full or something





!

Originally Posted by GypzyJack

The initial problem was that it wouldn't shut down with the key.

And theres the problem.

the fuel shut off is most likely not returning to the run position.

if you still have the electric motor make sure it winds with the key, it is possible (although very rare) for it to get itself out of phase with life, more common is electrical issues with it, it seizing up or blowing its fuse.

when you ignition on/off you should hear a noise like an old wiper motor doing one stroke when the ignition goes on or off. If you dont have that then your first issue is to fault find the wind motor or bypass it and use a manual control.

once you find the fuel cut cable (theres only 2 cables and one goes to the go pedal, if you need to have someone work the noisey pedal while you look at the pump) disconnect it. have your offsider crank the engine with their foot all the way to the floor while you operate the remaining lever. it'll spit fuel out the injector or start and run when you get the lever in the go position.