LB7: Overboost code?

77cruiser

Member
Apr 7, 2011
103
5
18
Frost Bite Falls
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.
 

clrussell

pro-procrastinator
Sep 23, 2013
5,906
363
83
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