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One for glort maybe? Fuel filter q


Tonka
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I ran out of diesel. So i put in 10 litres, primed the fuel filter by pumping it and undid the nut underneath. After a long time i finally kicked it over.

Anyay i let it run for a while then pushed the accelarator and nothing happened, actually it started to splutter then stalled. So i did the nut back up underneath and primed it again.. Now it wont start at all.

Suggestions? Should i go get another fuel filter

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So you ran the engine with the priming nut undone??? If yes then your pump will by dry..

Undo the nut again and pump like crazy untill you have fuel squirting out the bottom, tighten nut.

Undo in feed line to the pump..

Again pump crazily untill fuel comes out there. Tighten nut.

Pump again untill you can feel some pressure build up, then try start,

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I have had a similar Problem Tonka.

I think the problem is more with air in the filter/ Lines/ IP.

First I would Undo the hose where it connects to the Injector pump and using the primer pump on the top of the filter, pump the fuel through till it runs out the end of the line. You can reconnect to the IP and prime some more and try and start it. May work, may not.

If not, undo the banjo bolt for the return fuel loose enough so any air can get out and pump some more and try a re start. Lately when I have changed a filter I get air trapped in the IP that doesn't seem to purge like it did. I'm wondering If I have a blocked return line. Must remember to look at it.

Anyway, once you get it started re tighten the return bolt and you are good to go although don't be surprised if it takes a few Km before the stumbles and full power come back. I think it takes a bit to get all the air out the IP.

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Guys help me out here i need to understand the principle of what goes on along the fuel line. What pushes the diesel to the fuel filter or does the injection pump pull it in?

Reason im asking is i just spent an hour trying to pump diesel into the filter (nut open) and no fuel comes out the bleeder hose underneath.

So i removed the fuel filter and reattached the hand pump to the fuel lines. Now i tried pumping fuel out again minus the filter, still nothing.

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The hose underneath the filter is not bleeder hose it is drain hose to drain water from the filter. Close the tap, having it open just renders priming pump useless basically hand primer is trying to suck fuel or air in this case through that. Remove hose from outlet (the one going in to injection pump) on the filter than prime/hand pump until until fuel comes out from the fitting, than reconnect the hose and prime rest of the system.

Another old trick is to fill the fuel filter to the brim (with fuel obviously), refit than continue priming.

Cheers

Edited by Rumcajs
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Blockages.

If it was OK before and just ran out of fuel, I don't see any reason it shouldn't be fine now.

-IF- you can't prime it up ( and it will take some pumping!) then pull the panel up at the back to get to the tank and pull out the pickup and have a look. the holes in it are a bit on the small side and can easy get blocked. I slightly enlarged mine but the bigger you make them the more fuel will likley be left in the tank when it gets real low.

If you have a compressor then I'd also blow the fuel lines out while you have either end Disconnected. Don't be surprised to see a heap of black crap come out but don't be surprised if it dosen't either.

If you pump for a while and don't feel any resistance then I would prefill the filter and put it on as advised.

One of the upsides of having an electric pump is it does the hard work for you.

So, put all the plugs in the filter, take the fuel hose f at the IP, pump away 10 min and see how you go.

The filter is Higher than the tank so the fuel drains back readily and has to be sucked up to get it to the filter/ IP.

Edited by Glort
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Another good trick is to pressurize fuel tank to help with lifting fuel up, of course one needs compressor and some sort of cap/plug at the filler. I'm confident that if the primer works and you've got enough fuel in the tank you should be able to prime the filter. Sometimes particularly when running out of fuel just adding 10 liters is not enough especially with larger fuel tanks. Another way to confirm that lift/pick up system works is to run a line from a jerry straight to fuel filter and see if you can get the fuel in to IP.

All these suggestions are on the extreme end of fuel priming scale. Just make sure fuel filter is properly fitted/sealed and there is enough fuel in the tank.

Cheers

Edited by Rumcajs
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The hose underneath the filter is not bleeder hose it is drain hose to drain water from the filter. Close the tap, having it open just renders priming pump useless basically hand primer is trying to suck fuel or air in this case through that. Remove hose from outlet (the one going in to injection pump) on the filter than prime/hand pump until until fuel comes out from the fitting, than reconnect the hose and prime rest of the system.

Another old trick is to fill the fuel filter to the brim (with fuel obviously), refit than continue priming.

Cheers

This... PERFECT.

THANK YOU ALL.

i love learing about my truck!

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  • 6 months later...
  • 2 months later...

I get rid of the Original housing and it's overpriced filters and Fit a CAV as soon as I get a Vehicle.  They unfortunately don't have the non return valves. 
I was stripping a Subaru last week and spotted what I thought was a couple of non returns near the filter but they turned out to just be some sort of Dampeners so weren't' much use. 
Electric pumps make the priming easy and also eliminate problems with air leaks. 

I have been amazed over the years to find airleaks that will allow air into the system won't leak fuel when pressurised. 

 

A leak is a heck of a lot easier to spot with dripping fuel than with air being sucked in. 

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