Eliminating the rear o2 sensor

[Nofear20]

I am planning on using the capacitor and resistor technique to eliminate my rear o2 sensor. What is the best way to plug up the hole on the exhaust where the o2 sensor is supposed to plug in? I was thinking of using a bolt but I dont know what size bolt I need... Thanks

 

[BringBackDSM]

You could just weld it up. If you dont have a welder, a exhaust shop would probably do it for like ten bucks. The bolt idea may work also.

You could also just upgrade your exhaust and eliminate the cat, or get a high flow one.

 

[Nofear20]

I just upgraded the exhaust with a cat-eliminating downpipe which is why I am trying to find a solution for this. I would rather not weld it shut just incase I do decide to put a cat on it some day for whatever reason. Does anyone have any idea what size bolt would fit in the hole?

 

[Nofear20]

I may have a found the bolt size... It is M18 x 1.5.... Does anyone know where to get a bolt that size without having to order it? I need it asap...

 

[BringBackDSM]

If it eliminates the cat, then why is there even a hole there? Im confused. My megan racing dp has no hole for the o2.

 

[Nofear20]

The hole isn't in the downpipe its in the pipe right after the downpipe.

 

[snowborder714]

I may have a found the bolt size... It is M18 x 1.5.... Does anyone know where to get a bolt that size without having to order it? I need it asap...

I don't believe any hardware store sells anything bigger than M16. You may have to try an exhaust shop or a more commercial hardware store.

If it eliminates the cat, then why is there even a hole there? Im confused. My megan racing dp has no hole for the o2.

The MR downpipe doesn't come with a hole for an O2 sensor, but some people add one (like me for my wbO2). This hole is where a lot of people either put their stock sensor back in or install a wideband O2 sensor.

 

[BringBackDSM]

I see, thanks for the helping me understand.

 

[synthetek]

eBay Motors: Zinc Plated O2 Sensor Ring Plug Oxygen Sensor Rings (item 120202540162 end time Jan-25-08 08:12:45 PST)

Most muffler shops should carry these too.

 

[linksys42]

I am planning on using the capacitor and resistor technique to eliminate my rear o2 sensor. What is the best way to plug up the hole on the exhaust where the o2 sensor is supposed to plug in? I was thinking of using a bolt but I dont know what size bolt I need... Thanks

Instead of buying or putting together a o2 simulator go to AutoZone and buy two sparkplug anti fowlers they are like 1.50$ each drill thru one and screw them both together then screw them into the stock rear o2 bung then screw the stock rear o2 sensor into them so to keep the o2 out of the exhaust stream and poof no more CEL because the ecu just checks for different voltages from the sensor witch would indicate that the cat isn’t working the way it was designed to.

 

[nikkeebabee]

I just used the cut stock sensor for a short period. But I wouldnt weld the bung shut incase you decide to run a wideband...

 

[silvermitsu10]

I just left the O2 sensor in the bung and unplugged the battery. reset the ecu and the light never came back on.

 

[jaday]

Hey, I picked up a bolt that size to eliminate mine at Ace, they should be able to hook you up!

 

[DGajre777]

I may have a found the bolt size... It is M18 x 1.5.... Does anyone know where to get a bolt that size without having to order it? I need it asap...

I got mine at Discount Auto Parts in town, it was in the bolt sections. Try Home Depot or Lowes, if you don't find it at a car parts store and if the bolt at Home Depot is too long, you can always cut it.

 

[Nofear20]

Instead of buying or putting together a o2 simulator go to AutoZone and buy two sparkplug anti fowlers they are like 1.50$ each drill thru one and screw them both together then screw them into the stock rear o2 bung then screw the stock rear o2 sensor into them so to keep the o2 out of the exhaust stream and poof no more CEL because the ecu just checks for different voltages from the sensor witch would indicate that the cat isn’t working the way it was designed to.

I would do this but I had to cut my o2 sensor off becuase it was stuck in the old exhaust. We tried for a looong time and couldnt get it off.

 

[Nofear20]

Hey, I picked up a bolt that size to eliminate mine at Ace, they should be able to hook you up!

I checked at ace and couldn't seem to find anything that big.

 

[95CarbonEclipse]

I agree that it wouldn't be the best idea to weld it shut since some day you may want to add a wideband O2. Finding a bolt will probably be the easiest solution, but getting one of those spark plug anti fowler's and welding that shut would probably be the best idea. Going that route would allow you to plug up the hole without having anything portruding into the exhaust pipe itself.

 

[95CarbonEclipse]

eBay Motors: Zinc Plated O2 Sensor Ring Plug Oxygen Sensor Rings (item 120202540162 end time Jan-25-08 08:12:45 PST)

Most muffler shops should carry these too.

On second thought... this looks to be PERFECT!!

 

[Nofear20]

I ended up taking it to the muffler shop and they put a bolt in there for 12 bucks. It was well worth it, it sounds much better now.