Duramax Diesels Forum Truck of the Week
  #1  
Old 04-25-2018, 01:01 PM
77cruiser 77cruiser is offline
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Join Date: Apr 2011
Location: Frost Bite Falls
Posts: 59
Default Overboost code?

Got an overboost code yesterday pulling my new camper home.
Never seen the boost go over 27 even when giving it a blast on the 100hp tune & when towing I had it on the 30hp tune. Waste gate is free diaphragm held vacuum. Has a PPE boost valve SAC 45 injectors & 4 in. exhaust.

On a bright note I think it pulls as good or better with the new tunes on 30hp & the new injectors as it did on the 90hp PPE & the old injectors. No more smoke either.
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Old 04-25-2018, 01:39 PM
clrussell's Avatar
clrussell clrussell is offline
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Yes it will over boost with those conditions (set up and use)

Efi live tune will solve your issue as overboost code will be disabled
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Old 04-25-2018, 02:03 PM
77cruiser 77cruiser is offline
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I assume it must have to be at overboost for a certain time to set the code?
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