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Where is this hole supposed to go??

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Old Oct 5, 2003 | 12:05 PM
  #1  
DoBeR's Avatar
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From: Aurora, ON, Canada
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 4 Spd Auto
Where is this hole supposed to go??

Hey, when I bought my car the guy said something about a tube breaking off the cat. On the drivers side of it theres an air tube connected that goes upto the smog pump but I think its almost broken off.

Anyways, on the opposite side of the cat, theres like a half inch hole just open. Theres nothing around it to hook upto and I was wondering what to do with it?? It makes a hissing noise there and makes my car sound gay especially when im beside concrete barriers and other cars because it echoes back.

Any ideas where this goes???

Notice the little hole just to the right of center???



Last edited by DoBeR; Oct 5, 2003 at 12:18 PM.
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Old Oct 5, 2003 | 12:29 PM
  #2  
ontogenesis's Avatar
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Joined: Oct 2002
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From: Las Vegas, NV
Car: 1985 Camaro, 2015 Audi A4
Engine: V8
Transmission: 700R4
i know there's a hose that runs from the cat back up to the intake...atleast i remember one when my car was stock....been a while though, uhm...if your not noticing any problems, i'd say plug it
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Old Oct 5, 2003 | 01:53 PM
  #3  
DoBeR's Avatar
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From: Aurora, ON, Canada
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 4 Spd Auto
There is a hose hooked upto the cat but it comes out the other side. Should there be two of them??
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Old Oct 5, 2003 | 03:59 PM
  #4  
Trickster's Avatar
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Joined: Sep 2003
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From: conway, s.c.
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
That is where the air injection system (A.I.R.) was connected to the catalyic converter. The previous owner probably removed it.

The Trickster!!!!!!!!!!!!!!!
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Old Oct 5, 2003 | 06:07 PM
  #5  
Mikes 327 Z's Avatar
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Joined: Apr 2003
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From: Omaha, NE
Yep part of the air system, I cut that off when I removed my smog pump and air tubes etc. If you want, just find something to plug the hole. possibly weld a piece of metal over it or something of the such. Of course now I have a new engine, and no cat so my smog days are long gone.
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Old Oct 5, 2003 | 06:50 PM
  #6  
DoBeR's Avatar
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From: Aurora, ON, Canada
Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 4 Spd Auto
So you're telling me that theres supposed to be 2 air tubes going to the smog pump?? If u read my post I said that there is already one tube on the opposite side that goes to the smog pump...
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Old Oct 5, 2003 | 06:59 PM
  #7  
92 zzz28's Avatar
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From: Jacksonville, NC
Car: Guess
Engine: Crazy 8
Transmission: So close to being a manual I can taste it
In a stock system air is sent to the cat to aid in the process of eliminating the oh so dangerous gases that are supposed to lead to the green house effect and global warming. Hey, thats what the EPA says and they MUST be smarter than we are RIGHT...

THe reason you think your car sounds "gay" is because it is an exhaust leak. I had the same problem when I removed my cat years ago to hollow it out. I had no welder handy to reweld the tube so I just left it dangling. It sounded so stupid next to walls and stuff, it was embarrassing...
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