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

Power Problem

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  #1  
Old 07-20-2009, 03:02 PM
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Default Power Problem

Ive been working on this guys truck and its the sickest truck ive ever rode in.when its taking off it takes about 5 seconds to come on top of its self. sometimes it falls on its face just driving down the road. it keeps throwing a super/turbo charger boost control module code. it has efi live tune, cold air, and egr blocker. we cleaned the air filter replaced feul filter checked the injectors and i checked the play in the turbo theres no play. any ideas?
 
  #2  
Old 07-20-2009, 09:37 PM
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im guessing its an lly?

could be an over boost code
 
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Old 07-21-2009, 08:40 AM
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it is an lly and its not throwing an over boost code and it doesnt sound like its over boosting i watched the boost cuz i thought the same thing. the boost didnt do anything weird it hit 29 lbs
 
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Old 07-21-2009, 05:27 PM
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i hear there is a hidden overboost code on the lly's, fixing it dont know till i play with one
 
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Old 07-22-2009, 11:07 AM
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would it possiblly be the waste gate going bad
 
  #6  
Old 07-22-2009, 04:39 PM
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there is no wastegate on the lly, the vanes in the turbo act as one by controlling boost
 
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Old 07-23-2009, 12:14 AM
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i was always told it was an electronic wastegait
 
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Old 07-23-2009, 02:38 PM
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very rare but i had a couple where the vanes were stuck inside and the ring was rusted to the housing
 
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Old 07-24-2009, 12:28 AM
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could that give me an idea by watching the boost
 
  #10  
Old 07-24-2009, 04:21 PM
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and if vane postion does not meet desired
 
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