Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Where is?......

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Old Jul 14, 2009 | 09:08 PM
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Default Where is?......

The secondary o2 sensor on a 1998 Civic EX auto? Isn't there two or whats the dilly yo?
thanks
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Old Jul 14, 2009 | 09:09 PM
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Default Re: Where is?......

1st is on the header. 2nd is at the end of the car under the car
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Old Jul 14, 2009 | 09:11 PM
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Default Re: Where is?......

Originally Posted by IP RACING
1st is on the header. 2nd is at the end of the car under the car
How far at the end? i couldn't find any harness either. Help!!
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Old Jul 14, 2009 | 09:26 PM
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Default Re: Where is?......

It should be right after/on your cat. I'll upload a pic shortly...
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Old Jul 14, 2009 | 09:28 PM
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Default Re: Where is?......

Originally Posted by dookie_707
It should be right after/on your cat. I'll upload a pic shortly...
Someone removed this Cat so i have nothing to go by, Pics would be super cool!!!!
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Old Jul 14, 2009 | 09:32 PM
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Default Re: Where is?......

its near your downpipe.
Just jack the car up and take a peak its not that hard to see.
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Old Jul 14, 2009 | 09:41 PM
  #7  
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Default Re: Where is?......

Originally Posted by sirtef9
Someone removed this Cat so i have nothing to go by, Pics would be super cool!!!!
If that's the case, then this wont be super helpful...

http://farm3.static.flickr.com/2609/...73c3e33e_o.jpg
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Old Jul 14, 2009 | 11:38 PM
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Default Re: Where is?......

primary is on the exhaust manifold at the at the cat. and secondary is right after the cat where the header connects to the rest of the exhaust.

how did they remove the cat? the cat is part of the exhaust manifold so .... in other words they put in aftermarket headers?

if thats the case aftermarket headers with no cat they probably only have one bung for the primary. You would have to weld in a cat and tap a bung for the secondary o2 right after the cat
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Old Jul 14, 2009 | 11:46 PM
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From: Lake Wylie, SC, USA
Default Re: Where is?......

Originally Posted by fastrxu
primary is on the exhaust manifold at the at the cat. and secondary is right after the cat where the header connects to the rest of the exhaust.

how did they remove the cat? the cat is part of the exhaust manifold so .... in other words they put in aftermarket headers?

if thats the case aftermarket headers with no cat they probably only have one bung for the primary. You would have to weld in a cat and tap a bung for the secondary o2 right after the cat
Not on an EX or Si they have a different exhaust and the cat is under the car

Here is a pic of the secondary O2 on an EX/Si

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Old Jul 15, 2009 | 12:15 AM
  #10  
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Default Re: Where is?......

Is there just a test pipe? they may have just removed it. look above the test pipe and there should be a hole in the floor of the car somewhere around there. feel around to see if theres a sensor harness dealy hanging in there. I think this hole travels to between the center console and the firewall on the floor. sounds like its been removed completely if its not there and theres no cat.
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Old Jul 21, 2009 | 06:01 PM
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Default Re: Where is?......

Originally Posted by MHDesigns
Is there just a test pipe? they may have just removed it. look above the test pipe and there should be a hole in the floor of the car somewhere around there. feel around to see if theres a sensor harness dealy hanging in there. I think this hole travels to between the center console and the firewall on the floor. sounds like its been removed completely if its not there and theres no cat.
Should I just pop out the console and follow that harness down? I appreciate the help..
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