Hey guys, working on a 7fgcu35 with a gm 4.3. Truck was in tough shape when it showed up, underhood fire at some stage. Have gone through quoted repair and down to the last issue, dtc154 ego2 open/lazy. Truck runs full rich at startup, into closed loop the code triggers and continues to run rich, -35% fuel trim. To this point we've changed tank, vaporizer, running open air intake, full tune up, new lines and lock off, engine flush, new iat/maf, ego1 runs correctly, and have put a new distributor in the truck. Ego2 is pegged at 1.2v. does ego2 have any bearing on fuel trim in these trucks? Should we just replace it anyway? We've added a controlled leak inline with the PVC pipe to add in slight amount of air helping the fuel trims. With the leak closed off as in normal running condition fuel trim returns to -35%. Triggers DTC 1152 closed loop lpg low. PVC is new as well