Former GM Tech and parts
Join Date: Jan 2009
Location: West-Central Indiana
Ok, lets just start by looking at the codes you have.
P0089 is Fuel Pressure Regulator Performance-which you are going to get since it is not tuned correctly for the LBZ regulator.
P0103 is Mass Air Flow Sensor Circuit High Frequency
P1093 is Fuel Rail Pressure Sensor Out Of Spec which is likely also due to not correctly tuned for the regulator.
U1152 is HVAC communication loss
U1024 is TCM communication loss
So nothing there really that points to a fuel smell or low rail pressure. Clear the codes and see what comes back, see if it changes driveability. You probably wont see any change
If you have a fuel smell around the front of the truck, you need to look into that and see why and where. Having a lift pump on it, it could be pushing fuel out of a leaky hose and not supplying the cp3 with the fuel it needs.
You need to do something about the tuning issue with the regulator, before it causes a bigger issue. Whether its buy an autocal from PPEI or go to a different tuner, or whatever, you need to get it rescaled for the LBZ regulator
ASE Certified, former GM Parts guy
John Deere Service Manager
Play Truck - 2002 LB7 2500HD Crew Cab Short Bed
Daily/Tow Rig - 2006 LLZ 2500HD Crew Cab Short Bed
- 2007 LBZ 2500HD Standard Cab Long Bed SOLD
- 2006 LBZ 2500HD Crew Cab Short Bed SOLD
- 2004 LLY 2500HD Crew Cab Long Bed TRADED
- 2002 2500HD Crew Cab Long Bed SOLD
- 2001 2500HD Ext. Cab Long Bed