O2 sensor placement in a turbo downpipe! Tech Tip Tuesday

Shop stainless o2 sensor weld bungs

Shop aluminum o2 sensor weld bungs

[Vsareslow]

If you run too lean, you may think the sensor isn't working. Just doesn't have enough fuel to read so it doesn't work. If a sensor reads rich all the time (especially when off throttle), the sensor could be fouled out. Easy way to tell is by pulling fuel from the tune but it stays rich on the gauge. And if you have any exhaust leaks BEFORE the sensor (blown gaskets or exhaust cracks), that can mess with your proper fuel delivery because the oxygen that gets pulled in makes the ecu think the car is lean so it adds fuel, thus you run rich even though you think you have a proper reading. Just some things to keep in mind.

[Autofaze]

Always dig these tech tips from motion!

[KenFilmsCars]

Another good point regarding them reading bad is if they get a knock, have heard some brand new o2s can fail or read wrong purely if they are dropped or hit so look after them guys

[zachrehak]

I’d love a Tech Tip video covering plumbing a remote mount water pump setup with and without a thermostat! Asking for myself because I have no idea how.

[jimc]

Thanks for that important information. Never considered the condensation element.

[thefullbeanznetwork]

Cheers mate just what I needed to know 👌

[Glen_Patti_Hunn]

I was just wondering about that for the first turbo system I'm building. Now I know! Thanks!

[Envious_Nation]

Awesome tech tip. But! When are we gonna get updates on the extreme blazer build and updates for new parts for s10s? Love the channel guys.

[rhondalewis]

How bout a build video of your Drag Week trailer?

[jaydoleshal]

Do a video on your drag week trailer and what you carry.

[transamriderql]

I'm so thankful for this information

[joecameron]

Great information as always I enjoy tech tip Tuesday

[RecklessRegal]

Great video with excellent information as always guys!

[jcnpresser]

I work on everyday cars, and they do go bad and still read, if your cars idling and the afr is jumping around all over the place, chances are it’s bad. On fords we can data log the current that the o2 is using to monitor the afr, usually it’s close to 0.0 mA on a 14.7 afr. If it’s reading kinda out there like for example.437 mA at idle it’s probably bad, the engine run of the other sensor in closed loop fault, If that helps anyone.

[jarrettlabate]

Awesome that answered most of my questions except for one. If I am venting my wastegate back into my downpipe should the O2 sensor be before or after the wastegate exhaust is introduced?

[sloppycscustoms]

🤙🍕 Dude your tech stuff specifically has helped me out so much. Much love to you guy a Motion! 🤙🍕

[andrewsimmons]

I have my 2 waste gates plumbed back into the single 4 inch exhaust heading back the car to the firewall out of a single turbo mounted in typical radiator spot. Should my O2 be mounted 8-12 inches from the turbo or move back and pick up the waste gate gasses too? The waste gate dump into the 4 inch is approximately 12-14 inches from the turbo. Is that a concern?

[joeyk]

What about a single turbo set up with full exhaust muffler and a cut out?

[thomasjohnson]

Absolutely they can go bad and still read as a tuner I have a mounted aem Wideband for my supercharged Sierra and you can spot it when your chasing you tail dialing in your fuel lol. It will be sporadic or unstable . Closed loop divers or no Wideband well if it’s still operating within the error threshold no DTC will set and your fuel mileage will probably tank, fuel trims will be unstable or just poor performance. Plus super dangerous for you vehicle. If you went 100, 000 miles there well over do. God Bless.

[DigginZ]

I also have heard that extended periods of key on, engine off is supposed to contribute to the death of sensors. I do not know the science behind it, but may be something worth exploring further or even testing.