5.9 Liter CR Dodge Cummins 03-07 Discussion of 5.9 Liter Dodge Cummins Diesels with Common Rail Injection

Wierd Problem-Maybe

Old Mar 23, 2008 | 06:40 PM
  #11  
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Originally Posted by lukesdiesel
The problem only happens with the Smarty loaded. Any codes Wildbill?
This is still not indicative of a smarty only problem. The smarty may be modifying the problem, but most likely not the cause. If one truck has the problem..50 others will as well!
 
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Old Mar 23, 2008 | 06:43 PM
  #12  
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I guess we'll have to keep our eye's peeled.
 
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Old Mar 23, 2008 | 06:47 PM
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Originally Posted by mysterync
This is still not indicative of a smarty only problem. The smarty may be modifying the problem, but most likely not the cause. If one truck has the problem..50 others will as well!
True..... Lets see what happens on different settings. What kinda Gauges you got?
 
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Old Mar 23, 2008 | 06:49 PM
  #14  
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Super Chips Laser Gauges.
 
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Old Mar 23, 2008 | 06:50 PM
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Just wondering if something is going on with your fuel pressure.
 
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Old Mar 23, 2008 | 06:59 PM
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I need to do something to monitor. I hope my Fass isn't going south already.
 
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Old Mar 23, 2008 | 07:10 PM
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I see one of three things wrong

1: Bad or failing injector
2: Crank Sensor (rare sympt.)
3: Cam Sensor (Rare sympt)
4: Possibly a Bad overflow

Changing levels is only going to change other parameters and make it harder to diagnose. Always start your diagnosis with no programers and chips. While it may start better at first, theres always the possibility that the problem was never related to the programer!

If I can help, I will be in the shop tommorow! I've got to do a set of injectors on a CR truck, So if i dont answer leave a message and I'll call you back!
 
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Old Mar 23, 2008 | 07:16 PM
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I do have a slight rough idle. But if #'s 2 and 3 go, will it set off a code, or does the sensor have to completely die before a yellow light shines?
 
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Old Mar 23, 2008 | 07:22 PM
  #19  
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It may never set a code, its hard to say, Theres multiple ways a electronic injector can fail! Causing many symptoms and so on!
 
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Old Mar 23, 2008 | 09:48 PM
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Intermittent long starts and rough idle is pain to to trouble shoot sometimes. The most common causes are:

Leaking rail pressure relief

Bad injector

FCA malfunction

Gounded harness wire


The CPS and cam sensor could cause the same problem but are monitored pretty tightly by the ECU and should present codes. You usually see other problem with the sensors also.

I see you have an upgraded turbo. The AC compressor wire rubbing on a mount or condensor line will cause these exact symptoms. Its an easy check.

FCA is a bit trickier but unplug it and see if that changes the starting and idle. Clean the plug and dielectric grease it when you put it back on.

The rail relief you can check visually and rule it out.

Injectors are just a pain cuz they won't throw codes and can check perfectly fine yet be the source of the problem.

Good luck finding the issue.
 
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