Toyota 7FGCU35:
Constant dtc154: ego2

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. PVC is new as well
  • Posted 20 May 2020 01:29
  • Discussion started by NottaJ
  • Ontario, Canada

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