DIY Mechanical O2 simulator

tfnaaf · 01-02-2006

Ive been asked about how to do this process on more than one occasion and have been happy to supply the information. Hopefully someone will add this to the FAQ on turbos to help save some members some time ......

These are NOT my photos but im unsure of who the owner is exzactly. But they do give some very good photos and i hope that they dont mind

You now need to drill out 1 of the non foulers using a 1/2" drill bit. When finished this is what it will look like.

o2 Sensor inserted in the modified non fouler

Second, unmodified non fouler now installed on modified non fouler, then threaded into the downpipe

To remove this ad, register today for free or log in if already registered!

03-Acura-1.7-EL · 01-02-2006

I think you already had same thread sometime back. I've used your info to built same thing.
Can say its your own

?

Spoolin · 01-02-2006

good post. i saw this on some ep3 forum a while back and did this same thing. works great

nick95673 · 01-02-2006

how does this work? It just picks up less emmission gasses since its further back?

kornsined · 01-02-2006

has been working great for 8 months.

tfnaaf · 01-02-2006

Im hoping it to get added to the FAQ

i know its sorta a pre-post

4*banger · 01-02-2006

sry for bieng such a noob but how does this work?

drunkenmagnum · 01-02-2006

awsome! i think i am the member that finally pushed him over the edge!

drunkenmagnum · 01-02-2006

.............

tfnaaf · 01-02-2006

Nahhh, you were just the more recent person to ask

But if we can get a mod to add this to the FAQ it will save people time i hope

Quote:

Originally Posted by drunkenmagnum

awsome! i think i am the member that finally pushed him over the edge!

Pedro Lopes · 01-02-2006

You do this to the first 02 sensor right ( The one before the cat).

tfnaaf · 01-02-2006

The second O2 sensor NOT the first!

Quote:

Originally Posted by Pedro Lopes

You do this to the first 02 sensor right ( The one before the cat).

skipbarber · 01-02-2006

lol, if you did this to the first o2 sensor, youd be throwing all sorts of codes.

Havok2k1 · 01-02-2006

Added for ya

v8eaterokv6 · 01-03-2006

so what does this do exactly or how does it work

tfnaaf · 01-03-2006

it restricts the amount of exhaust that gets to the second o2 sensor. This gives it a higher AFR reading. This simulates the cat doing its job when its not there

Quote:

Originally Posted by v8eaterokv6

so what does this do exactly or how does it work

texascivic2k1 · 01-03-2006

Quote:

Originally Posted by nick95673

how does this work? It just picks up less emmission gasses since its further back?

That is exactly how it works... (Correct me if I am wrong)

Very GOOD Post!!!! I have done the same thing with mine. I have been threw two state inspections and has lasted a year and a half. I have that Megan Racing down pipe by the way. Great job!

texascivic2k1

boricua_civic · 01-03-2006

I bought a casper 02 sim from Hivtec a while back, he's from PR too, and it was cheap and the B!tch engine light is off

4*banger · 01-03-2006

Nice!!

drunkenmagnum · 01-04-2006

oh be sure to get the 18mm and not the 14mm. i accedently got the wrong ones the first time.

5.0calypso93lx · 02-23-2006

This works great, put it on when i installed a megan test pipe on my g/f's car last night, no cel. Sounds killer too.

Kingnine · 03-03-2006

This tip quite possibly saved my sanity. KUDOS!
Works great on my ebay special catless downpipe...!

ncirom2003 · 03-11-2006

so now lets say i do this, could it potentially cause tuning issues because the ecu is reading incorrect data and adjusting a/f ratio off of it, or does the ecu only adjust a/f according to the first o2 sensor?
i think im gonna try it.

tfnaaf · 03-12-2006

Quote:

Originally Posted by ncirom2003

so now lets say i do this, could it potentially cause tuning issues because the ecu is reading incorrect data and adjusting a/f ratio off of it, or does the ecu only adjust a/f according to the first o2 sensor?
i think im gonna try it.

The ecu only adjust AFR off of the first O2 sensor

nighthawk1903 · 03-12-2006

I Have 3 02 Sensors so i use this on the 2nd one, before the cat, and the third one after the cat right????

ncirom2003 · 03-12-2006

well then im going to make a quick trip to autozone and get these things! ill be very happy to not have cel's.

skipbarber · 03-12-2006

Quote:

Originally Posted by nighthawk1903

I Have 3 02 Sensors so i use this on the 2nd one, before the cat, and the third one after the cat right????

you have 3?? stock? either way, you want to use it on the one after the cat only.

nighthawk1903 · 03-15-2006

I have a HX with a EX header an testpipe conversion now my header has 2 02 sensors top an bottom.an my cat has one after, my stock manifold had a honeycomb like resonator on it i might get some pics if need be,an the cat had one, so i have 1 02 bypass in the testpipe check engine light (STILL ON)..... I didn't drill it out could this be why???? an what would happen if i put it on the lower 02 sensor ????????/

tfnaaf · 03-15-2006

Quote:

Originally Posted by nighthawk1903

I have a HX with a EX header an testpipe conversion now my header has 2 02 sensors top an bottom.an my cat has one after, my stock manifold had a honeycomb like resonator on it i might get some pics if need be,an the cat had one, so i have 1 02 bypass in the testpipe check engine light (STILL ON)..... I didn't drill it out could this be why???? an what would happen if i put it on the lower 02 sensor ????????/

Im so confused by what your saying. .......This is how it should be.

First O2 sensor in manifold closest to the cyl head

Second O2 sensor further down pipe , past cat converter( if you have one )THIS IS THE ONE THE FOULERS SHOULD BE ON AND YES IT MUST BE DRILLED OUT OR THE O2 SENSOR WOUNT FIT IN IT!
Third O2 sensor.........

Unless its a wideband i have NO idea what your talking about

ncirom2003 · 03-16-2006

cant a shop do something while the cars being dyn0-tuned so that the cel will never come on for cat codes?