24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps
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Just Replaced VP44 And Still Won't Run

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  #41  
Old 09-18-2008, 09:59 PM
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Code won't set until you attempt to start the engine with a connection unplugged. What you can try is unplug the water temp sensor and try and start it. If no code, be looking at the dealer or Cummins and have em hook up a Star Scanand check the ECM.
 
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  #42  
Old 09-19-2008, 07:24 AM
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Originally Posted by wildbill
Code won't set until you attempt to start the engine with a connection unplugged. What you can try is unplug the water temp sensor and try and start it. If no code, be looking at the dealer or Cummins and have em hook up a Star Scanand check the ECM.

That's what I did.

Kinda hard to visit the dealer when the truck won't run. I guess I could have it towed back to them AGAIN, but last time they weren't much help.
 
  #43  
Old 09-20-2008, 06:51 PM
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UPDATE!!

It runs! I don't even know what I did, but here is how it went:

Cracked open the return line from the VP44
Keyed the ignition on
Noticed very little fuel coming out of the return line(I'm not sure how much is supposed to come out?)
Cracked open the feed line and keyed the ignition
Noticed plenty of fuel coming out of the feed line.
Tightened everything back up and attempted to start
Motor did the same thing it has been doing
Held the go peddle to the floor and cranked it over, letting it start and die about 15 times
With the go peddle floored it actually started to idle on it's own
I let off the go peddle and went through the engine bay poking at wire harnesses and wiggling lines.
Everything looked good
Unplugged MAP sensor
Check engine light came on
Plugged map back in
Unplugged AND removed cam sensor, no check engine light, plugged back in, but did not install
Motor was at operating temperature at this point(about 10 minutes of rough idleing)
Turned ignition off
Waited 30 seconds and started the engine.
Engine idled SMOOOOOOOTH. Hit the go peddle and for the first time in weeks, it reved!
I gave the go peddle hell and a cloud of black smoke covered my neighborhood.
Took it for a hotlap and all seems to be well.

The cam sensor is still just hanging in the engine bay, but it runs like a raped ape. I'm not complaining. I'm jusat stoked it's running.

Thank you all for your help and suggestions. I REALLY appreciate it and I hope someone reads this in the future and it helsp them.
 
  #44  
Old 09-20-2008, 06:55 PM
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Well - thats defintely good news. Congrats
 

Last edited by Uncle Bubba; 09-20-2008 at 07:34 PM.
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  #45  
Old 09-20-2008, 08:36 PM
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I think I might have some loose battery connections, too. Next time I went to start it I got the same issues. After a few attempts it started and ran perfect. My battery cables were still loose from when I was working on it so I'm hoping that was the cause. Kinda weird how it can be a paperweight one minute and run like a champ the next.
 
  #46  
Old 09-20-2008, 09:49 PM
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Loose battery clamps are a pretty big deal and is often something thats overlooked.
 
  #47  
Old 09-20-2008, 10:39 PM
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Glad to hear you got it running. We all should have done the KISS principle first.
 
  #48  
Old 09-20-2008, 10:50 PM
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Makes ya wonder if your original pump really was bad.
 
  #49  
Old 09-22-2008, 07:14 PM
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Well now it's back to not running. Don't know what happened. It drove like a dream for 30 miles and now it is doing the same thing it has been doing.

One thing I noticed is the cam sensor seems to have alot of oil on it and there seems to be a leak inside the timing cover that's doing it. Either that or there is alot of blowby? I clean the cam sensor and put it back in and it doesn't seem to help.

---AutoMerged DoublePost---

Ok so now it's back to running like a champ. Fired right up, first time and ran great.

---AutoMerged DoublePost---

Is it normal to have oil in the timing chain area? When I remove the cam sensor, oil will leak out at a pretty steady rate. Is that normal? The cam sensor has been covered in oil everytime I remove it.
 

Last edited by Justinlhc; 09-22-2008 at 07:14 PM. Reason: Automerged Doublepost
  #50  
Old 09-22-2008, 07:32 PM
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yes there is supposed to be oil in there

sounds like to me a issue with the cam sensor itself or the wiring
 



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