Simple Wideband O2 Location

[Matthew Jeschke]

I'm getting ready to install my new motor. I don't know I want to cut the exhuast weld, do all that hoopla. I watched Goat Rope Garage. He said to put a O2 bung in the exhaust tubing just after exhaust manifold. Then I hear of some other tuners that just put it at the end of the tailpipe. I understand that will rear leaner (tune will ultimately be a bit richer) but does it make that bit of a difference?

Got an AEM Wideband setup with gauge, and sensor. Also have HP Tuners for truck.

I just want a clean and easy location to mount the thing and run the wiring. Perhaps the rear O2 sensor hole? What have you done and how did it work out?

 

[Scottydoggs]

i had a bung welded in pre cat pass side. then i added two pinned wires to the pcm to import the wb signal to the egr, have to turn the egr on in the tune. then disable its settings.

 

[Matthew Jeschke]

That's what I see some people doing. Curious how far off the tune would be if I just put it further back in the exhaust where it's already wired up for a sensor.

 

[fasteddy]

Precat will give you the best A/F reading. Offset from O2 sensor hole.
Where are you going to mount the gauge?

 

[Scottydoggs]

ive ran the sensor pre and post cat, but had a high flow cat, made zero difference in its reading. a real cat i could see making it change tho.

 

[Matthew Jeschke]

Precat will give you the best A/F reading. Offset from O2 sensor hole.
Where are you going to mount the gauge?

Not sure. I'm not really big on the idea of permanently mounting it. A little more hip on temporary mounting the gauge. I like keeping things in factory configuration (or at least following their design philosophy). With that in mind, I ran cabling for a roof light and CB radio. I opened up the factory grommet in firewall (without poking holes in it). Royal PITA, I mean ROYAL PITA. If you ever have to run something, cut another hole in the firewall and put a cable gland in there. The ones for boats are SUPER high quality. If need be, I may do that to at least bring the wiring into the truck. Just wish there was a more user friendly way to set this all up. It's within my means to do it I am just lazy.

ive ran the sensor pre and post cat, but had a high flow cat, made zero difference in its reading. a real cat i could see making it change tho.

Good to know. I have factory cats on my truck. I may have to drop the exhaust and cut that hole then.

 

[Scottydoggs]

Not sure. I'm not really big on the idea of permanently mounting it. A little more hip on temporary mounting the gauge. I like keeping things in factory configuration (or at least following their design philosophy). With that in mind, I ran cabling for a roof light and CB radio. I opened up the factory grommet in firewall (without poking holes in it). Royal PITA, I mean ROYAL PITA. If you ever have to run something, cut another hole in the firewall and put a cable gland in there. The ones for boats are SUPER high quality. If need be, I may do that to at least bring the wiring into the truck. Just wish there was a more user friendly way to set this all up. It's within my means to do it I am just lazy.



Good to know. I have factory cats on my truck. I may have to drop the exhaust and cut that hole then.

ive got my sensor mounted near the trans iirc, its the most open area to get a drill to. its supposed to rain all day tomorrow, but i could get a pick for ya Monday.


i dont even see mine any more, you know unless im looing at it.

i didnt have the heart to drill a large hole in the A pillar so they are just tucked in down the side of the dash to the fuse box.


that pod is for a Silverado, i painted it. it comes black.

 

[Matthew Jeschke]

Looks slick! I am not sure I'll ever do it but I also have a C5 corvette. I originally bought HP tuners for it as I was going to go forced induction route. Then realized traction limited shifting to 4th gear is probably enough power haha

That aside, I like the idea of two cars, one tuner. I had been looking at those pods though. I even bought a second A pillar cover incase I wanted to do a gauge pod.

How did you route the cables to power the wideband? You have to power it from the gauge right?

 

[Scottydoggs]

power comes from the fuse box. used a add a fuse. sensor wires goes up and over the engine top to a hole in the d/s fire wall, then routed to the a pillar.

 

[Scottydoggs]

i put a innovate dual wideband in my ss camaro. had one in my regal too. pretty much if im tuning my cars, they get a wb installed. my camaro is gonna be running meth injection on day soon, so having the wb mounted is a must. the regal was on meth too. nice to see it go lean should the meth pump quit. little bit of a heads up to let off asap lol