I recently purchased a AEM wideband and was wondering on how to hook it up. I did the search but couldn't find the information I was looking for. I wanted to know if I can tap the stock 02 sensor and if so what wire. I know the AEM came with a 02 sensor, but i would have to drill a hole and add a bung for the sensor. I have a 06 tc with the trd sc, stock headers. If a bung has to be added I know a s-pipe has an extra hole correct? Thanks.

 

Yeah you have to weld that bung in. If not, you spent 200-300 dollars on a narrowband. Better make use and install that bung and use the extra sensor they gave you. That's the whole purpose of the UEGO.

 

I mean i dont think more is needed to be said here, you have to get that bung which came with the gauge drilled and welded to your pipe...

Like stated above that o2 sensor is the whole purpose of the gauge....

 

thanks for all the help what would be the ideal location for the sensor, or is there aftermarket parts (S-pipe) I could just buy and use the bung on that.

 

you can talk to Todd (turbotoyotas) or maybe Paul (dezod) and order an s-pipe with an extra bung already welded in. It really doesn't cost much to just have a muffler shop weld it in for you ($30-$50 est.).

according to aem (should say it in the uego manual) 6-8inches down stream of the head for n/a apps. 12inches downstream for boosted and vehicles running race gas. trying to remember it from memory so if its off a little please forgive me. Mine is about 3inches infront of my secondary o2sensor.

 

i will have a 2.5 spipe for sale soon.. it comes with 3 O2 bungs! :D

 

PLUS< that bung needs to be as close to the cylinder head as possible, i went basically side by side, but a lil staggered with the factory Wideband o2, the closer to the head, the more accurate the reading.

 

it doesnt have to be very close to the head, too close will may reduce the life of the sensor due to high egts.. as long as the O2 sensor gets enough heat and velocity it should be as accurate.. even tailpipe O2 sensors gets close readings to the actual wideband

 

thanks guys you anwsered my question to. I was thinking about putting it in front of my 2nd o2 and guess that will do fine.

 

According to my Autometer Pro-Comp Instruction Manual, They Say as close as possible to the head, so thats what i did!
I would advise anyone to do the same, i mean we are threading an o2 sensor in here, not a piece of bucket lid. the sensor will not burn out because of 2 high of egt's.

 

he has an aem wideband so i advise him to follow the aem wideband recommendations like what crush mentioned.. and hot egts will burn o2 sensors, may not be right away especially on forced induced application or when race gas is used or an bad tune, it will warp and crack manifolds too

 

so my understanding is with the AEM guage to install it on the headers 3" above the 2nd 02 sensor. Since I have the TRD sc I know some headers wont fit while others heat up quickly and if the heat shield is not installed might affect the sc? is this correct otherwise any good headers recommended?

 

Put it a couple inches after the secondary o2 sensor and should be good to go, I had my welded on for 20 bucks...

 

does anyone have a picture of the stock headshied with the stock header. My car is used and I think there is already a bung installed next to the stock 02 sensor, the heat shield even has a cut out for it.

 

okay so I found out there is a bung installed already but its near the 1st 02 sensor, will that be a problem?

 

wait....are you trying to install your wideband on your stock header?

Why is this in the forced induction?

What are you using the wideband to monitor? Stock A/F ratio's, cuz imo you just wasted 200+ dollars on a gauge unless your going F/I, which would ditch the stock header all along?

What you tryign to do here

 

wait....are you trying to install your wideband on your stock header?

Why is this in the forced induction?

What are you using the wideband to monitor? Stock A/F ratio's, cuz imo you just wasted 200+ dollars on a gauge unless your going F/I, which would ditch the stock header all along?

What you tryign to do here

 

well it sounds like the previous owner may have had an egt (exhoust gas temp gauge). an egt you would want as close to the head as possible.

 

I think he stated in his first post that he had the TRD s/c..and that he bought the car used and it had a second O2 bung in the stock header which was on there previously and he was asking if he could use that as is second bung.

 

i wouldnt but thats just me.....i tend to follow the manufacturers suggestions.