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new exhaust..doesnt have o2 bung...advice?..plz

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Old 10-28-2010, 11:10 PM
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new exhaust..doesnt have o2 bung...advice?..plz

so ..yesterday, i put on my new y pipe, and full..y pipe back exhaust..2.5 all the way back to muffleer.....no cats, nothing...so its loud..but thats because of my leak lol....
the y pipe has the 2 o2 sensor holes ...thats good...hooked those up..no problems..now..the problem is the down stream o2...where the cat was..where the hole for the 3rd o2 sensor ususally is..is just pipe..so now obviously it threw a cel ...but i took it today to auto zone to check for the o2 code just for shizz and giggles...but no code haha ...idk!?!? no cel before exhaust, and now missing one o2, cel...but no code...
-..could i just drill...insert and weld the o2 in place with a couple spot welds,..would that ruin the o2?...should i use an o2 simulator?...advice on this would be great cuz im sure pple have ran into this because of everyone having done there exhaust before... thanks!


just moved this from classifieds lol sorry!
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Old 10-28-2010, 11:13 PM
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I had a bung put in my test pipe so i could just put the sensor in like stock.
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Old 10-28-2010, 11:15 PM
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ok....dont laugh too much...but i keep hearing test pipe, different pipe terms, etc...so what is the "test pipe"..like high flow cat or something?
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Old 10-28-2010, 11:18 PM
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Just exhaust piping with flanges welded on that take place of the catylitic converter

Last edited by Mr.A32ftw; 10-28-2010 at 11:21 PM.
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Old 10-28-2010, 11:21 PM
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oh ok lol...so just extra pipe..well my exhaust is just welded all the way through..no flanges...not a big deal...got a buddy witha lift and welder so im not too worried bout having ease of access cuz we have no problems cutting and welding.. lol but i will look at getting that done soon because i wanna get rid of that darned light! haha i had it gone for a month...it was soo nice not seeing it there! but now..ugh haha..i might just use the stock bung...thatdrops down a lil bit and just weld that inplace?...possibly..
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Old 10-28-2010, 11:25 PM
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I had the stock bung cut off my stock cat and welded on my test pipe. No shop I went had the right bung size without ordering and I didnt want to wait
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Old 10-28-2010, 11:31 PM
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dude you can buy an O2 sensor bung for like $3 - any muffler shop should have them. you drill an appropriately sized hole in the pipe where you need the O2 sensor installed and weld the O2 bung on, and screw the O2 sensor in like it is supposed to be installed.

a test pipe is a replacement pipe that goes where your catalytic converter would be.
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Old 10-28-2010, 11:33 PM
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Originally Posted by Nealoc187
dude you can buy an O2 sensor bung for like $3 - any muffler shop should have them or just go to an auto parts store. you drill an appropriately sized hole in the pipe where you need the O2 sensor installed and weld the O2 bung on, and screw the O2 sensor in like it is supposed to be installed.

a test pipe is a replacement pipe that goes where your catalytic converter would be.
ok thats what ima do, i kinda wondered who would sell them, i wasnt sure how easy they were to come by, i will go look around tomorrow lol thanks for the advice!
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Old 10-28-2010, 11:41 PM
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if you can't find them at a muffler shop or parts store try a piping supplier like mcmaster carr or something like that. failing that, buy one online. i just googled and there are about a million places that sell them for $3-5.

btw I've flown in to the martinsburg, wv airport.
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Old 10-28-2010, 11:44 PM
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haha nice, i drive by there like....all the time...i saw on ur profile youlike to fly, ive probably flown as many miles as are on my car right now in my lifetime...lol 235000 haha
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Old 10-29-2010, 12:50 AM
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Originally Posted by tsheffler
ok thats what ima do, i kinda wondered who would sell them, i wasnt sure how easy they were to come by, i will go look around tomorrow lol thanks for the advice!
Just make sure that when you weld in the bung it's in the 9'oclock to 3'oclock range.
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Old 10-29-2010, 06:38 AM
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I actually prefer the 10 o'clock thru 2 O'clock positions if there's enough room....
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Old 10-29-2010, 08:16 AM
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Originally Posted by CMax03
I actually prefer the 10 o'clock thru 2 O'clock positions if there's enough room....
So do I. I guess I should have mentioned that. I just gave the 'industry standard' answer.
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Old 10-29-2010, 08:24 AM
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I thought that sensor didn't affect anything? When I replaced my cat, my friend took out the O2 for me while I was unbolting the rest of the catback and he crossthreaded it. I just have it ziptied there.
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Old 10-29-2010, 09:56 PM
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haha ok..im newbing again..when you say 10 ta 2 or 3 ta 9...you mean like if i cut off the exaust and looked down the pipe...like as if i was looking at the clock.....so like right on the side..or if i have enough room, up a little bit with the wire almost pointing at the drivers seat...ish?
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Old 10-29-2010, 09:59 PM
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Originally Posted by ChrisMan287
I thought that sensor didn't affect anything? When I replaced my cat, my friend took out the O2 for me while I was unbolting the rest of the catback and he crossthreaded it. I just have it ziptied there.
It can be O2 simulated since it's a downstream O2, but I never heard about letting it be "free".
Originally Posted by tsheffler
haha ok..im newbing again..when you say 10 ta 2 or 3 ta 9...you mean like if i cut off the exaust and looked down the pipe...like as if i was looking at the clock.....so like right on the side..or if i have enough room, up a little bit with the wire almost pointing at the drivers seat...ish?
Yes, exactly.
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Old 10-29-2010, 10:13 PM
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ok cool thanks!..lol well...if your talking about me saying its just free...i just disconnected it and put it inthe trunk for now lol
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Old 10-29-2010, 10:15 PM
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Originally Posted by tsheffler
ok cool thanks!..lol well...if your talking about me saying its just free...i just disconnected it and put it inthe trunk for now lol
You're welcome.

And I was addressing Chrisman287
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Old 10-29-2010, 10:18 PM
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oh ok lol thought it wasnt me...but didnt wanna go looking all the posts...all 15 of them lol
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Old 10-29-2010, 10:28 PM
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what brand y-pipe, normally they come with a bung welded in, but its no big deal to get one welded in though
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Old 10-29-2010, 10:33 PM
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the y pipe itself has 2 in it, but its the downflow one after the flex section and cat that im missing..on the "catback" section
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Old 10-29-2010, 10:37 PM
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oh ok gotcha
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