Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

6.5L Having Issues

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Old Sep 21, 2009 | 06:15 PM
  #21  
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design flaw that wont come up in a dyno room where they test these things because its not really hot in there. yhey should of got rid of them though after they realized they were bad
 
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Old Sep 26, 2009 | 07:37 PM
  #22  
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Bad news all around... No new codes showing up, just the PO236 and 238. However, the 238 code showed up under pending codes on the scanner. So if I understand it correctly, thats what was tripping the ses light. Any more suggestions would be helpful.

Thanks
 
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Old Sep 28, 2009 | 02:38 PM
  #23  
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Anybody??
 
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Old Sep 28, 2009 | 06:45 PM
  #24  
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the boost sensor is probably broken. thats about all that is left.
 
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Old Oct 9, 2009 | 08:53 PM
  #25  
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alrihty, update time. Got home today, boost sensor installed, went for a drive, same problem. Any more suggestions would be helpful. Could this be a result of me adding a #9 resistor when I added te PMD. Maybe more fuel generating to much boost causing the ecm to defuel??? If this is a possiblilty how can I get around this problem??
 
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Old Oct 9, 2009 | 09:00 PM
  #26  
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Too bad I don't know as much about the 6.5's as I do the 5.9 common rails. Sorry guy.
 
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Old Oct 10, 2009 | 12:03 PM
  #27  
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every number you go up in resistors the fuel output goes up by.5mm3 of fuel. thats equal to about 2 to 3 horsepower. nothing you can feel and nothing the computer will defuel the engine for.

---AutoMerged DoublePost---

why dont you install a fuel pressure gauge to check the fuel pressure when you lose boost
 

Last edited by Woody35; Oct 10, 2009 at 12:03 PM. Reason: Automerged Doublepost
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Old Oct 21, 2009 | 01:06 PM
  #28  
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I think as of now I'm just going to deal with the problem as it is and wait till something worse happens. Just one more question, I had the truck sitting over the summer while I was working on the bumper, which took quite a while since my work bench was a hay wagon... Any way something could have happened tothe ecm since it was sitting, the batteries were disconnected for an extended period of time.
Thanks again
 
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Old Oct 21, 2009 | 11:15 PM
  #29  
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highly unlikely. did you store it in a place with no moisture. all that happens is that the computer relearns how you drive after its been sitting
 
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Old Oct 22, 2009 | 12:11 PM
  #30  
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It was inside outside, got completely drenched a couple of times.
 
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