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Exhaust question what is this thing

 
  #1  
Old 11-16-2010, 09:01 PM
Slowroll90
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Exhaust question what is this thing

I have a 94 f150 with a 302
I have three things between the exhaust manifold and the tailpipe
First thing I assume is my cat
The third is the muffler
But the middle thing I'm not sure
It looks similar to a cat
Is it a second cat or a resonator?
I'll put up a picture later if it helps
But I figured someone might know without
A picture
 
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Old 11-16-2010, 09:23 PM
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Its a second cat
 
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Old 11-16-2010, 09:23 PM
ne-oublie
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Second cat, i have one on mine also.
 
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Old 11-16-2010, 09:28 PM
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Ok thanks.
That's what I was thinking
While I have your attention
Is there one or two oxygen sensors?
I see one where the two pipes join together in front of the first cat
Is there another?
 
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Old 11-16-2010, 10:10 PM
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Just that one O2 sensor is all it has.
 
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Old 11-16-2010, 10:17 PM
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guy at autozone said two
i guess he was mistaken
 
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Old 11-17-2010, 12:00 AM
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There are 3 on mine, one on each down pipe from the manifolds, and one after the first cat.
 
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Old 11-17-2010, 12:23 AM
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oh really?
 
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Old 11-17-2010, 01:03 AM
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My dads '92 F-150 has just one oxygen sensor, after the Y, and before the cat......
 
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Old 11-17-2010, 01:28 AM
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Trucks equipped with OBDII (1996 and later) diagnostics will have three O2 sensors to help diagnose problems and to verify a functioning cat.
 

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