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Joined: Nov 2006
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4 point
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4 point
Joined: Nov 2006
Posts: 499 |
Over the past year or so, my 02 2500HD has been having problems with not cranking, or shortly after cranking it would die. Lately there has been several times I couldn't get it to crank at all, only to come back and it fire right up. Also had it die going down I20 twice.I was told to rebuild the fuel filter head assembly. Did that and it continued. Asked a mechanic at a job site I was on and he said the head assembly on those are bad to crack and go bad. So replaced the whole thing. Wouldn't crank at all after. Came back to the office where it was at after 3 days off, and cranked with no issue. Drove it 3 days with no problems and this morning on my way in to work, it died on I20 again. After a few minutes of fooling around with it, it still wouldn't crank. A coworker was about to head out to get me, and I decided to try it once more and it cranked fine. So I have read the crankshaft position sensor could be causing this problem. Anyone know if that might be it or have any other suggestions I should try? I am getting tired of dropping money on it for it not to be fixed. Also, since I know someone will ask, it ad 132K on it when I bought it and had the injectors changed shortly before, and it now has 160K. I have also tried 2 new fuel filters, and replaced the supply and return lines for the fuel filter.
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steelman
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steelman
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Stupid question but after replacing the housing and filters etc, are you priming the housing and bleeding off the air?
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Joined: Mar 2013
Posts: 15,426 Likes: 16
Old Mossy Horns
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Old Mossy Horns
Joined: Mar 2013
Posts: 15,426 Likes: 16 |
I bet you got an injector leaking down.
83% of all statistics are made up.
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Joined: Nov 2006
Posts: 499
4 point
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4 point
Joined: Nov 2006
Posts: 499 |
Yes, I am bleeding the air and priming. I was also told to check the oil and if it was over full and smelled like fuel then it would be a cracked injector. But was normal level and smelled like motor oil.
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Joined: Nov 2012
Posts: 242
4 point
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4 point
Joined: Nov 2012
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Lb7 are known for bad injectors
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Joined: Dec 2012
Posts: 9,661
14 point
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14 point
Joined: Dec 2012
Posts: 9,661 |
Yes, I am bleeding the air and priming. I was also told to check the oil and if it was over full and smelled like fuel then it would be a cracked injector. But was normal level and smelled like motor oil. Pull your dip stick and let one or two drops of oil drip on a paper towel. Oil will stay put but fuel will spread. If you have fuel in your oil you will be able to see where it seperates on the towel. Does that motor have a check valve in the fuel rail or line? If you can't get it work in, scrap it and get a Cummins. 
Eli, Eli, lama sabachthani?
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Joined: Nov 2006
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4 point
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4 point
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Lb7 are known for bad injectors Yeah, I read that before I bought it. The guy I bought it from said he knee a mechanic that said that if you change the fuel filter every 10,000 or every time you change the oil then they are less likely to go bad. So I keep the filter changed regularly. Guess I can take it to have the injectors checked.
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Joined: Dec 2012
Posts: 9,661
14 point
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14 point
Joined: Dec 2012
Posts: 9,661 |
Lb7 are known for bad injectors Yeah, I read that before I bought it. The guy I bought it from said he knee a mechanic that said that if you change the fuel filter every 10,000 or every time you change the oil then they are less likely to go bad. So I keep the filter changed regularly. Guess I can take it to have the injectors checked. Also run some injector lube or motor oil through your filter base to lube them up in case you have a hanging injector. Today's diesle fuel sucks. It doesn't have any lubing properties.
Eli, Eli, lama sabachthani?
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Joined: Nov 2006
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4 point
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4 point
Joined: Nov 2006
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Lb7 are known for bad injectors Yeah, I read that before I bought it. The guy I bought it from said he knee a mechanic that said that if you change the fuel filter every 10,000 or every time you change the oil then they are less likely to go bad. So I keep the filter changed regularly. Guess I can take it to have the injectors checked. Also run some injector lube or motor oil through your filter base to lube them up in case you have a hanging injector. Today's diesle fuel sucks. It doesn't have any lubing properties. Last time I put fuel in it I put a tube of Lucas lubricant and injector cleaner in it thinking it might help, with no luck obviously. I usually put some in the fuel once a month to try and clean things out.
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Joined: Feb 2007
Posts: 5,579 Likes: 11
12 point
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12 point
Joined: Feb 2007
Posts: 5,579 Likes: 11 |
No idea if the Chevy's are similar to the Fords, but have you looked at the FICM (that's what they are called on the Fords)?
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Joined: Mar 2013
Posts: 15,426 Likes: 16
Old Mossy Horns
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Old Mossy Horns
Joined: Mar 2013
Posts: 15,426 Likes: 16 |
Lb7 are known for bad injectors Yeah, I read that before I bought it. The guy I bought it from said he knee a mechanic that said that if you change the fuel filter every 10,000 or every time you change the oil then they are less likely to go bad. So I keep the filter changed regularly. Guess I can take it to have the injectors checked. I had mine('03) checked out, but nothing would show up on the computer while it was running. I parked it in the service parking lot one day and it wouldn't crank. They checked it then and it showed a problem. One of my injectors was loosing pressure and which was making it not crank. They replaced my injectors and I haven't had anymore issues.
83% of all statistics are made up.
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Joined: Jan 2013
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3 point
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3 point
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On the times it wouldn't start did you try and prime filter if so did any air come out ?
Which hoses did you replace the ones attached directly to filter houseing
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Joined: Feb 2003
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12 point
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12 point
Joined: Feb 2003
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Mine did the same thing..I replaced the fuel filter housing with a brand new one..It came with a new filter as well..No more problem!
Wisdom doesn't always come with age.
Sometimes age shows up all by itself.
Roll Tide
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Joined: Feb 2003
Posts: 5,924
12 point
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12 point
Joined: Feb 2003
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Mine is a 05..That housing has several o rings and the primer pump goes bad also!!
Wisdom doesn't always come with age.
Sometimes age shows up all by itself.
Roll Tide
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Joined: Nov 2006
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4 point
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4 point
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On the times it wouldn't start did you try and prime filter if so did any air come out ?
Which hoses did you replace the ones attached directly to filter houseing Yes, air comes out most times it dies and I have to prime it, but not every time. And I had to replace the hoses going directly to the filter housing when I got the new housing.
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Joined: Nov 2006
Posts: 499
4 point
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4 point
Joined: Nov 2006
Posts: 499 |
Mine did the same thing..I replaced the fuel filter housing with a brand new one..It came with a new filter as well..No more problem!
I rebuilt the original one with new rings and seals and it continued, so I put a new one on that had the housing, filter and WIF sensor and after 3 days it died again. But after priming and letting it sit for a few minutes of trying it cranked right up.
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Joined: Apr 2010
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10 point
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10 point
Joined: Apr 2010
Posts: 3,290 |
I know little about DURAMAX but I do know diesels. It sounds like it's getting on air somewhere. One or more injectors could be bleeding down causing it to shut down. This could also explain why it won't start at times. If an injector is leaking when the truck is turned off them then it's pour raw fuel onto the cylinder which could eventually wash out that hole. You def want to fix it before that happens as that will def cost some decent money to fix. Also the crankshaft position sensor should cause a check engine light to cone on if something is wrong with it. Mines an 02 5.3 gas burner and I had a check engine light cone on. Scanned it and found it was that same sensor. One final thing I have seen. Those fuel filter housing can get stopped up themselves. Not sure what you did to rebuild it but did you replace the plumbing in it? I have replaced lots of them on other brands because they had 15-25in/lbs of restriction in the housing itself cutting fuel pressure off. However I would think that if that were the case the problem would be more consistent rather than sometimes. I have also see many times some foreign object down in the fuel tank that you can see just looking down in the tank. The rubber peice that sits inside a coke bottle cap that was ever so often sucked over to the pickup tube and causing it to go dead. We worked on it 5 days before finding our smoking gun. That is a very hard problem to find. Have you tried running it out of a bucket when it wouldn't crank? If you haven't then try that next time. If it cranks right up then that may isolate your problems from being behind the pump to in front of it. Good luck man...
If your decoy doesnt have holes in it, your not letting him get close enough... J.H.
"Life lessons are almost never found where you think they should be, sometimes they're in the middle of a small, muddy creek in the woods with steep banks"... DeadorAlive
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Joined: Aug 2007
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14 point
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14 point
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Posts: 9,040 |
I'm not familiar with the Duramax, but those symptoms sound alot like when the Crankshaft Position Sensor is going out on a Ford 7.3. The 7.3 will not throw a check engine light for a faulty Crankshaft Position Sensor.
I would think if an injector is leaking fast enough to outrun the fuel pump and starve the other injectors of fuel, you should notice a significant amount of fuel in the oil.
Take your kids hunting instead of hunting your kids.
I'd rather be LOST in the woods than FOUND in the city.
Drive a hybrid, I need your gas.
Your mind is your primary weapon. Never let it get rusty.
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Joined: Dec 2011
Posts: 331
4 point
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4 point
Joined: Dec 2011
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This is the easiest fix in the world. Just roll a ford 6.7 under it 
Last edited by Larue5596; 02/18/15 01:28 PM.
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Joined: Jul 2011
Posts: 39,598
Freak of Nature
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Freak of Nature
Joined: Jul 2011
Posts: 39,598 |
Heck just bring it to our shop. It looks like a Dodge 2500 dealership out there during the day. Every guy in the shop except one and my brother drive Dodge trucks. (We don't really work on them, but those guys in the shop work on theirs after hours)
If my people, who are called by my name, will humble themselves and pray and seek my face and turn from their wicked ways, then will I hear from heaven and will forgive their sin and will heal their land. 2 Chronicles 7:14
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