Karl, you could bypass the EVAP or rig it somehow-but would likely cause check engine light/code permanently set. With computer-operated modern injected vehicles- the computer is the boss, period, as Ron said. Won't pass smog test that way, and won't run right until that problem is fixed. I say fix that issue and the O2- and you could finally get what you've been fighting for so long.
It's not all roses w/ older carb. stuff either. Gotta be willing to go out of your way w/ either carb. or injected.
I've never heard a story like this w/ 3 different O2's possible for same VIN#.
Anyone have more input on the O2 issue...?
I'd connect w/ heysoundude, he seems pretty astute, nearly same truck as yours Karl buddy!
The EVAP stuff isn't THAT complicated, mostly finding the components IMHO.
I feel yer'frustration...but I think you have finally spotted codes that explain the erratic behavior, Ive had issues on my vehicles persist for years till I figured then out...The EVAP issue is vacuum leak- and if its a wrong O2, it's speaking Martian to the ECU...
Diagnostics are a big part of this game. The basics need nailed down to get the gains, end of story. It's challenging for us Gadgetmen, most of us don't work in a shop, and we're all over the Planet. So we have to share info here. And we have to deal w/ stuff mostly on our own. But we have the chance to learn a LOT as well, to better serve ourselves and others- to make a difference.
I appreciate Karl's long saga w/ his truck, he's been teaching me things for some time now.
I mean no offense to you Karl, I've been goading you for a long time. But I think you've really found the trouble this time.
Tracy G