Chevy/GMC Duramax 04.5-05 LLY Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines

Occasional injector rap when cold

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Old Nov 25, 2012 | 09:24 AM
  #1  
jrdduramax's Avatar
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Default Occasional injector rap when cold

First off I'm new here and say thanks in advance for any advice.
2004.5 LLY 100,000 miles KN air filter/Banks 4" down pipe back/Diablo sport tuner.
Sometimes when engine cold I will get a rap from injector "just one" and occasional miss, seems to clear up when warm. I always use dieselkleen and change fuel filter regularly.what the best way to diagnose?
 
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Old Nov 25, 2012 | 08:05 PM
  #2  
2004LB7's Avatar
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From: Fool's Golden State
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Turn off one at a time with ether EFI Live or the tech II.
 
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