Sounds good. That is the type of fix I was hoping for. I might just weld a nut to the frame and mount the rear O2 there. That way the truck wont rattle it to pieces or chaffe my wiring. That takes care of that... Now, I dont have the harness in my hands yet, so this might be a self-explanatory question when I see it but... Here comes my next question for you guys:
By building a stand alone harness, do I forfeit my ability to plug in an OBDII scanner, or is the port part of the engine harness? If its not, is there a way to add it to the engine harness? And/Or- How do stand-alone engine swap guys run a scanner to check sensors or adjust ECU info?

 

Oh, also, will short tube headers and a very mild cam mess with my ecu too much, or can it handle that much tweaking? Alot of people say that the labor vs HP gain isnt worth it, but I have a 5.2 cam which is a touch hotter than the 5.9 cam. I think Ill throw that in there while im at it. I would go beefier, but I happen to already own the 5.2 cam, and I will have the engine that far apart anyway.

 

Anyone? I see lots of pickups with headers, so Im guessing that wont mess the ECU too much, and the 5.2 cam is bearly hotter than the 5.9 cam, so it shouldnt be a problem, right?

 

Check the 2nd gen ram board and pm Hemifever. he should be able to tell you if you need a tuner for that cam.
Dave

 

but he would also have to wire up a obd2 system for Hemifever to do a tune and then that would cost $365 on top of whatever it cost to make a obd2 wiring harness.

 

Sorry i didnt mean for him to ask for a tune from him, just weather or not he would need one with that cam.

Dave

 

Well, I learned that wiring up the OBD2 port wont be much of an issue. The wires that run to it all come from the power distribution pack under the hood. I will just make the OBD2 port relocated under the hood and splice it into the original wiring. Basically just remove the length of wiring it took to get it under the dash. As for tuning, I might just have to inquire if it will require a retune.

 

The environment under the hood is not the same as in the cab. If the port is going under the hood I would fashion some sort of cap for it to keep trash and moisture out of it.

 

Im sure I can fashion some sort of cap for the OBD2 port. As for wiring, there are only 4 wires that come from one of the computer pinouts and run to the OBD port under the dash. Wires stay color coded.