LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Will exhaust leak AFTER 02 sensors cause bad readings?

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Old Mar 12, 2004 | 02:58 PM
  #1  
Hyperspeed97z28's Avatar
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From: Upstate, NY (Albany area)
Will exhaust leak AFTER 02 sensors cause bad readings?

Will an exhuast leak right after the O2 sensors cause a problem? I have 93 stlye SLP headers with the y-pipe, I have a slight leak at my y-pipe (do-nut gaskets) will this throw the readings off ?

I have new fel pro gaskets ready to replace, But I'm curious as to what it would affect either way...


Thanks in advance...

-Keith
Old Mar 12, 2004 | 09:43 PM
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Depends how close the leak is to the O2's. If it's within something like 8 inches, it could have an effect.
Old Mar 12, 2004 | 09:51 PM
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what kind of effects could it have?
Old Mar 12, 2004 | 10:16 PM
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your car would run rich. The oxygen from the leak makes your car think it is way lean, so it adds fuel
Old Mar 12, 2004 | 10:27 PM
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i do kinda smell fuel in the exhuast fumes....
Old Mar 12, 2004 | 10:51 PM
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From: conshohocken
i have a leak before the o2 on the passenger side header bolt.my car is running crazy rich and runs like crap.my idel is all ****ed up.i dont think if the leak is after the o2 it will cause it to run rich
Old Mar 13, 2004 | 12:18 AM
  #7  
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From: Lake Orion Mi
Originally posted by ledfootz28
i have a leak before the o2 on the passenger side header bolt.my car is running crazy rich and runs like crap.my idel is all ****ed up.i dont think if the leak is after the o2 it will cause it to run rich
yes it will
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