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Old 06-21-2015, 04:36 PM   #1
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MAYCO, broke down on the road need advice

So we are about an hour way from home spent the last four days camping. Rig has been running like a top. Packed up this morning and started her up, let it run for several minutes and pulled out of our spot. Got a hundred yards or so and she started sputtering, lost power and then died. Sitting here now scratching my head;

Just cleaned the KnN last week
Just had the valves adjusted ladt week, ran great before and after
It tries to start, fires but wont continue to run
No diesel on hand but went ahead and changed both upper and lower fuel filters.
Waiting on diesel to be delivered to fill the filter canisters
When I removed upper filter very little fuel was present
Tried using the manual priming pump but it wasnt doing much

Any other ideas I should look for? Hoping its not the injector pump. When they go do they go all the sudden or is it a gradual thing? The Isuzu has been runnin absolutely flawless......thanks for any ideas

Thanks again
Mike
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Old 06-21-2015, 04:39 PM   #2
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Sounds like the coil or points failed!

I think you are on the right track with the fuel. Possibly air in the system. Bleeding it would be a start.
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Old 06-21-2015, 04:41 PM   #3
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MAYCO, broke down on the road need advice

It's common enough on the Cummins that they have an electric air purge pump on both mine. Any deteriorated lines or connections can let it suck air into the system and loose prime.

Here's a video that might be helpful.

http://youtu.be/DyIfCmjDB2Q
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Old 06-21-2015, 05:03 PM   #4
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Hmmmmmmmm, broken or cracked fuel line...
Well, still waiting on a gallon of diesel to fill the fuel canisters. I guess the next step would be to trace the fuel lines back to the tank. I assume you mean soft (rubber) fuel lines not hard lines
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Old 06-21-2015, 05:14 PM   #5
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I had a rotted o-ring on my pre-filter screen sight glass that was causing the PO problems. It kept quitting and he would have to purge the air. He thought it was vapor locking. Unlikely in a diesel.

I'm betting you just have some air.
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Old 06-21-2015, 05:18 PM   #6
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It shouldn't happen unless you have place for air to get into the system or have opened up the system as in a filter change. 20+ year old lines, seals, and gaskets tend to be the culprit.
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Old 06-21-2015, 05:21 PM   #7
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Oh and the plugs and plug wires look good.
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Old 06-21-2015, 05:50 PM   #8
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Does your MOTORHOME have an electric lift pump ? (an electric fuel pump to deliver fuel from the tank in the rear to the high pressure pump in the front )
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Old 06-21-2015, 05:52 PM   #9
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KOTA, PLEASE STILL BE ON LINE. Ok I found it, the bottom of the plastic canister on the racker fuel separator was toast several hair line cracks. Tap on the bleeder on the bottom and air bubbles galore up into tye fuel. Took the bleeder out and the thing is toast. NOW, can I bypass that filter and drive 45 miles to get home , the upper fuel filter is still in place and it filters smaller particles. Will I risk any damage by bypassing the rackor filter for 45 mikes???????
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Old 06-21-2015, 05:53 PM   #10
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Oops 45 miles
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Old 06-21-2015, 06:06 PM   #11
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Mike you should be good to go as long as you haven't fueled up at a questionable diesel station with cobwebs on the filler.

That was a fast find but not surprising as bleeders and the plastic fitting threads age, these things will happen. The key is not to panic thinking it's the fuel pump. You were smart to start at the cheapest place first and work your way up to the most expensive.

If you have some fuel conditioner to dump into the tank it will help dissolve and disperse any water in the tank........just don't use the bottom of the tank.

Cheers
Tony
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Old 06-21-2015, 06:09 PM   #12
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Mayco,

From my limited experience with your diesel, (a friend had one, we traveled together) but lots of experience with Racor diesel filters, you should have no problems at all as long as you have the extra fine filter still in the circuit. Go for it, replace the Racor when you get home.
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Old 06-21-2015, 06:45 PM   #13
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MAYCO, broke down on the road need advice

Quote:
Originally Posted by mayco View Post
KOTA, PLEASE STILL BE ON LINE. Ok I found it, the bottom of the plastic canister on the racker fuel separator was toast several hair line cracks. Tap on the bleeder on the bottom and air bubbles galore up into tye fuel. Took the bleeder out and the thing is toast. NOW, can I bypass that filter and drive 45 miles to get home , the upper fuel filter is still in place and it filters smaller particles. Will I risk any damage by bypassing the rackor filter for 45 mikes???????

I think you will be fine.

Parts for the older Racor systems are discontinued. A friend switched replaced his with one of these. I'll be putting them on both of mine. They also make it with a manual primer for about $75.

http://www.parker-racor.com/pump/index5.htm
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Old 06-21-2015, 07:01 PM   #14
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Originally Posted by Kota View Post
I think you will be fine.

Parts for the older Racor systems are discontinued. A friend switched replaced his with one of these. I'll be putting them on both of mine. They also make it with a manual primer for about $75.

http://www.parker-racor.com/pump/index5.htm

Click image for larger version

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If yours looks like this I have a serviceable one you can have.
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