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Ok what the heck did I break

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yolner

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I had some issues with hunting idle so I decided to check the in-tank pump/hose. Pulled the pump. Replaced the hose. Cleaned the screens. Reconnected all the fittings.

Drained old diesel and put in 20 gals of fresh.

Also had a leaky fitting on the IP after I installed the westfolk fuel filter kits. Pulled that fitting and put some gas rated teflon on the threads and reinstalled the plastic fuel line into it.

Finally, turned the idle screw in a bit while I was in there to raise the idle.

After all this, the first time I went to start the truck it started up but the idle was up and down. I shut her down to go look what I did wrong. Didn't see anything obvious. Went to start it back up and crack crank nothing. Tried a few more times and it just won't start. Before this it started first crank.

I went over everything I touched about a dozen times and I don't see what I could have done to make it quit starting. I need some new ideas before I push it off the nearest cliff :)
 
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NoLeftTurns

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Have you bled the air out of the fuel filters, and fuel line? I can't really help in terms of the deuce but you need all the air out of the line, not just out of the pump. I would assume that lack of fuel is your culprit, since it started before and you only touched fuel related items. Now in a gasser I'd say pull the plugs and Check for wet, but I am just reading and learning deuces. I don't know diesel at all. Can you pull a glow plug and check to see if the injectors are injecting fuel? Any air in the system will compress and not flow fuel.
 
Y

yolner

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Well the westfolk filter kits don't actually have air bleeders. What he says to do is run the fuel pump for 2 minutes which will push the air out of the system. I did that when i first put them on and it seemed to work.

Just now I tried opening the water drain on the secondary filter while the pump was on and got a spray of fuel. Seems like the pump is pumping at least.
 
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NoLeftTurns

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If you have fuel at filter then you need to check further down the line. Pull an injector? See if it is in fact spraying into the cylinder. I assume you are getting no sputtering when you are trying to start? If you have sputtering you getting some fuel, no sputter no fuel. You can also check for lack of air, but that seems unlikely.
 
cranetruck

cranetruck

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FWIW, try to do without the teflon tape (white or yellow), it makes a mess when you have to take apart the parts later. Use a paste type sealer on pipe joints.
No sealer should be used on tube fittings...
 
Floridianson

Floridianson

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NoLeftTurns said:
Have you bled the air out of the fuel filters, and fuel line? I can't really help in terms of the deuce but you need all the air out of the line, not just out of the pump. I would assume that lack of fuel is your culprit, since it started before and you only touched fuel related items. Now in a gasser I'd say pull the plugs and Check for wet, but I am just reading and learning deuces. I don't know diesel at all. Can you pull a glow plug and check to see if the injectors are injecting fuel? Any air in the system will compress and not flow fuel.
Click to expand...

Think you need to read some TM's and threads on IP system. Glow plugs????????????
 
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NoLeftTurns

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I did state I was un familiar with diesel. I have maybe started three ever. The principals of engine mechanics however remain the same. If the cylinders are not wet then hes not getting fuel. I later suggested the injector as an alternative. I don't own a deuce and was not in the military so I am not familiar with acronyms or manuals. I have read some tm's but as any mechanic knows, you can't understand the book till you see the engine. Just saw the post and trying to help. Point taken.
 
asgtoolman

asgtoolman

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NoLeftTurns said:
I did state I was un familiar with diesel. I have maybe started three ever. The principals of engine mechanics however remain the same. If the cylinders are not wet then hes not getting fuel. I later suggested the injector as an alternative. I don't own a deuce and was not in the military so I am not familiar with acronyms or manuals. I have read some tm's but as any mechanic knows, you can't understand the book till you see the engine. Just saw the post and trying to help. Point taken.
Click to expand...
Don't let them rattle you; you're offering basic advice. Stay involved and you will be able to contribute to this site. There are all levels of experience represented; some take it a little too seriously.
 
westfolk

westfolk

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A fairly quick and easy way to check your fuel status is the following.

On the filter housing. The fuel line that is returning from in front of the IP head...this is line#3 on installation. Turn the collar off the fitting so that you can pull the line out. Now turn on your master switch. You should have a good flow of just diesel. If it has bubbles with the fuel you are getting air in the system, and there is the problem. If you have good straight fuel all the air is pushed out of the system to and passed the IP. As this is the line returning to the tank.
Doing this will eliminate the question of fuel getting to the IP. You then know it is something else.

Also, FWIW if you look at the filter housing you will see on the rear side facing the cab and closest to the engine the housing has a plug in it. This is 1/2" NPT thread. You can take that out and install a bleeder valve. I have had some guys do it because that like the idea. I don't put it on because it is truly not needed, and more importantly would jack the price of the kit up.

I would question the shut off sticking.

Feel free to consult me.
 
JDToumanian

JDToumanian

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Don't let them rattle you; you're offering basic advice.
Click to expand...
There's several thousand deuce owners here who are familiar with the multi-fuel engine and can give basic advice... Pulling the "glow plugs" and injectors is way off base for a likely air-in-the-fuel-system scenario.

We're not trying to 'rattle' anyone, but folks ought to offer advice where they have knowledge or experience... Otherwise, read and learn. ;-)

Jon
 
Y

yolner

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She's alive!

I'm not sure what exactly fixed it, but heres what I did.

1. Took shutoff mechanism cover off and made sure the lever inside was moving smoothly.

2. Took off the return line on the filter base and made sure fuel was flowing. Got a couple of bubbles, but then clear fuel.

3. Tried to start it and she purred to life.


The awesome part is that my hunting idle problem is gone. The idle was perfectly stable for the few minutes that I let it run. Seemed to be running smoother too. Must be the fresh diesel.

Thanks to everyone who contributed ideas. Now there's only 999 things left to fix :)
 
JDToumanian

JDToumanian

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The hunting idle before it conked out is a symptom of air in the system... So you probably just bled the air out and it was good to go.

Glad it's running again... [thumbzup]

Jon
 
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