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Cummins Air Bleeding



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Old 02-20-2006, 10:11 AM   #1
 
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Cummins Air Bleeding SUCCESS!!

Ain't had time to search; must get to hospital.

Fuel guage doesn't work properly

It was showing just under 1/4 tank when I ran dry on the way to the hospital this morning (icey patches...wanted 4WD just in case). How do I know it ran dry? I had the AAA dude swing by a fuel stop on the way home. 35.1 gallons in a 35 gallon tank.

Now I have a big headache.

Last edited by Hatch; 02-21-2006 at 10:30 PM..
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Old 02-20-2006, 12:24 PM   #2
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have fun it takes afew min to do but not hard to bleed the system. find a air chuck and push it in and have someone turn it over. or loosen the farthest line from the pump and bleed it.

Don't know where it is located thou. not on a cummin.
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Old 02-20-2006, 05:13 PM   #3
 
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This is a gen3 motor. It's my understanding they are sorta self-priming. You just bump the starter, then let the lift pump do it's job for about 25 seconds.

I've done this over and over at least ten times.

I found a little push-in valve-ee thing on the side of the pump (like a valve core on a tire sort of) and pushed it in while the lift pump was pumping and got a good stream of fuel.

Even if I need a new filter (probably do after sucking the junk out of the bottom of the tank), seems like it would at least try to start.
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Old 02-20-2006, 05:14 PM   #4
 
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Filter changing (priming):

http://dodgeram.org/tech/dsl/filter/00fuel_filter.htm

Quote:
Turn the key to the run position. Bump the starter for a millisecond and let the key stay in the run position as if you had actually started the engine. You will hear the lift pump cycling for about thirty seconds, which will circulate fuel and push any air in the system back to the tank. Bump the starter several times, allowing the pump to cycle each time, then attempt start the engine.
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Old 02-20-2006, 09:34 PM   #5
 
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I guess this means there ain't too many other idiots like me around here.
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Old 02-20-2006, 09:55 PM   #6
 
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Well, Alan, I have heard diesels are real hard to get started after they run out, so I ahhhhhhhhhhhhhh don't let it under any circumstances let it run dry. But live and learn, my good man. OH, did you get it started yet?
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Old 02-21-2006, 12:17 AM   #7
 
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Gordon: I guess you missed the part about the fuel guage reading just under 1/4 tank. I had begun to think about getting fuel, but didn't think I was anywhere near critical. The first thing I looked at when it died was the fuel gauge. It was between 1/8 and 1/4, closer to 1/4.

No, it's still not running again. I'll put a new filter in sometime tomorrow. Dad in the hospital and issues with his dental practice (closing out...he won't be going back to work) are sucking up all my time.
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Old 02-21-2006, 03:09 PM   #8
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i always had to bleed when i change the filter on the 7.3 indirect motor.or when i change injectors, or replace the fuel pump lol.
but that is pretty cool. since it is all electric got to make it easier. mine was all manual lol.

But i never had a hard time starting a diesel after all of this. just bleed it and crank it over with the pedal pushed down to open the throttle. and eventually it comes to life blowing the biggest black cloud on the block!! lol
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Old 02-21-2006, 07:15 PM   #9
 
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Throttle open? Hmm. I assumed it was an electronic throttle and would only open as much as the puter says it should open.

I was tempted to disco the pre-heat and spray in some starting fluid today. Didn't do it.
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Old 02-21-2006, 07:36 PM   #10
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I ran my 2000 out of diesel once, learned a hard lesson. Luckily I had roadside assistance and the kid they sent out knew just what to do. He pulled out a wrench and loosened each fuel line on the side of the motor slightly, had me crank the motor until diesel squirted out, tightened it and moved to the next one.

You might check tdr.com
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Old 02-21-2006, 09:12 PM   #11
 
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Loosenned the fitting on the side of the head, below the point where the valve cover meets the head? I tried that on a couple of lines to get some air out. Never saw any fuel come out. Wasn't even sure that was loosening anything important. The actual injectors are under the valve cover, aren't they?

I'm afraid the injector pump has chosen this magic moment to give up the ghost. Lord I hope not. According to Haynes manual, thirty seconds of cranking should have showed some sign of starting. If that doesn't work it says to loosen high pressure lines starting with farthest from the pump and watch for fuel. Maybe I'm being too cautious waiting on fuel. It's hard to do without anyone to help me whilst running between hospital, Dad's different banks, his office, talking to dentists that may be interested in buying his practice, grading exams, and preparing 6-week grades.

What don't kill ya makes ya stronger, right?
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Old 02-21-2006, 09:22 PM   #12
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You're gonna need to bleed the air while someone's cranking. You may check the fuel filter and see if it's dry, if it is, add some diesel.

When I ran out of fuel, I put some fresh diesel in and was never able to get it to fire until the lines were bled, I mean I cranked, let the pump cycle, etc. Good luck.
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Old 02-21-2006, 09:37 PM   #13
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got to get the air somehow. helps to have someone else turn it over.
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Old 02-21-2006, 09:37 PM   #14
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oh and my was still throttle cable setup. I HATE ELECTRIC CABLE!!
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Old 02-21-2006, 09:45 PM   #15
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Let me start off by saying I have never been under the hood of a gen 3. The older ones had a fitting that you loosened to bleed out the filter. Then you need to loosen all the lines closest to the injectors possible. You can do them all at 1 time. Then turn it over. Within 30 sec or so you should see a little spitting. If not I would think there is a reason that you injection pump has lost its signal. Have you checked all the fuses/ relays per the manual you have? Does this truck have an enertia switch that may have been tripped? That one cost me $175.00 from the Ford dealer. Since then I read my manual completely. It was in the manual but I knew nothing about it. Anyway let us know how it works out. JJ
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Old 02-21-2006, 10:27 PM   #16
 
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No I didn't miss the part about the fuel gauge. Really sorry to hear your dad is not doing to well, wish him the best from the 4x4ing world. You got that yellow dodge, that'll get you where you need to be, let the diesel sit for a day or two. It's going to work out and the diesel will start again.
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Old 02-21-2006, 10:40 PM   #17
 
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Well shucky darn. Now that I know how to do it, it's easy. Kaint be skeerd of the high pressure lines going into the head (to the injectors).

A] I loosened what I think is #1, #4, and #5 (figuring if I could get three cylinders working it would start). They were the easiest to get a wrench around.

B] Crank for about 20-30 seconds, then check for fuel seepage near the fittings. #5 showed fuel, the others didn't.

C] Tighten any fitting(s) that show fuel.

D] Crank for about 20-30 seconds (engine may sound close to trying to start). Shut off engine if it tries to start, then check for fuel seepage around remaining loosened fitting. I saw fuel around #4.

E] Tighten any fitting(s) that show fuel.

F] Crank for about 20-30 seconds (engine may sound close to trying to start). Shut off engine if it tries to start (or actually starts, as mine did), then check for fuel seepage around remaining loosened fitting. I saw fuel around #1.

G] Tighten any fitting(s) that show fuel.

That was the last one for me. She fired right up after that and ran fine; no strange smoke, loud clattering, or rough idling.

NOTE: I kept jumper cables on the CTD from a running vehicle the whole time.
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Old 02-22-2006, 07:14 AM   #18
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Glad you got it started.Just about any diesel will be hard to start when ran out of fuel.
I have a detroit V12 at work that takes me about 2 hrs to start if i run it out of fuel,and thats knowing exactily how to fix it.
Best to keep fuel in them.

As a side note: The only time my 6.2 has "ran" out of diesel,the fuel guage still said 1/8 tank. I dont let it get near that low anymore.
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Old 02-22-2006, 08:20 AM   #19
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Well shucky darn.
how old are you???
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Old 02-22-2006, 05:54 PM   #20
 
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how old are you???
Ancient. I'll probably be dead from old age in another four years (when I hit 50).
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