No o2 sensor? How bad is it?

[mk3-4-me]

So my downpipe doesnt have the studs that hold the stock o2 sensor in.

I can figure a way to hold it there, but i was jw how bad it is, and if u guys run without them.

 

[Devin LeBlanc]

If you run with out one, it will set a code 21 and will run Full rich VF correction which will screw up the whole TCCS, on a side note if you like getting 10 miles per gallon, (so rich that it could wash down the cyl walls and dilute the oil causing rod knock) Check engine light on, ECU in limp mode ect. Go for it

 

[mk3-4-me]

By the way, its a built 7mgte, stock electronics for now...

 

[Devin LeBlanc]

no, don't do it.....

 

[mk3-4-me]

Damn lol dnt gotta be so hasty... Lol ok ill run it... I was just askin... Lol

And i never had a code 21 either... Wierd... Lol but my oil did smell like gas, so that explains it...

Thx for the help!!

 

[Devin LeBlanc]

It has to be in its learning mode for long enough for it to set a code.. IE 70mph on the freeway for 20 miles or so.. Just driving around town and doing WOT pulls wont set the code

 

[empera]

If your down pipe is after market and you have a threaded hole you can just use a screw type 3 wire o2 sensor.

and no...don't run the car without one.

 

[Devin LeBlanc]

Correct I am running a Bosch O2 Sensor for a Nissan 300zx with a weld in 18mm bung. Has the signal and Heater circuit

 

[empera]

mustang o2 works...i think early one from a 5.0 or just an ngk 3 wire

 

[mk3-4-me]

Ok thx alot! Yes i have an m18 bung i believe... Ill look for some of those o2's at a junkyard... How would i match the wires to solder them correctly?

Ya i never drove the car long enough to get the code i guess...

 

[Devin LeBlanc]

There is two non polarized Heater wires, doesn't matter how they hook up, and a signal wire which is blue on the toyota

 

[Moy]

You don't need use a threaded O2 sensor.... if your studs pulled out and you have two threaded holes, the screws that hold the wastegate actuator to the compressor housing on the stock CT26 will screw into those holes

 

[Devin LeBlanc]

What kind of down pipe is it? does it have a flange for the stock O2 sensor and is just missing the studs?

 

[te72]

What kind of down pipe is it? does it have a flange for the stock O2 sensor and is just missing the studs?

That's what I gathered... I ran a BIC DDP for a few months (while it was running haha), and I just used a couple bolts that fit the threads, problem solved.

 

[mk3-4-me]

Theres no threaded bolt holes, just a threaded bung... Its a 3in v-band DP... I had it where a wire went through the holes on the sensor, and wrapped it around the DP... lol

 

[jetjock]

1) You will not get code 21.

2) The engine will run only slightly rich.