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Old 03-05-2021, 08:00 PM   #1
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1999 F53 catalytic converter needed?

Someone decided that they wanted my catalytic converter more than me so they cut it off and off of another class C stored in the same lot.



I spoke to the muffler shop that I had some work done on another older, F53 and he ask why I wanted to put a converter back on. They will probably just steal it again.


My real question is , the replacement converters all seem to have a hole for a O2 sensor. I need to look closer but I don't see any wire hanging down where there was one on the original. Did it have a sensor?



If I just have them replace the cat with pipe, will it throw a code that I have to worry about?


Thanks for any advise in advance


Richard, Newark, Ohio
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Old 03-05-2021, 08:44 PM   #2
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My 1999 F53 has only 2 upstream O2 sensors.
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Old 03-05-2021, 10:07 PM   #3
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There a file in the files section call 1999 obd or something like that. You can look at it and see if the sensor has been deleted.

Here a link

https://www.irv2.com/forums/download...do=file&id=173

The cat sensor and down stream O2 sensors have been calibrated out.
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Old 03-05-2021, 10:33 PM   #4
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Had the same thing happen to my 2000 Roseair. The new converter is a Magniflow 4451300. It came with plugs where the o2 sensors would go. Mine doesn't have sensors in the converter. I decided to have the muffler shop put removable clamps on a straight pipe and the converter. When it's in storage, straight pipe. When it needs a smog check, converter. It doesn't throw codes. More horsepower and better mpg with the straight pipe.
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Old 03-05-2021, 10:34 PM   #5
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Any requirement for SMOG testing in your neighborhood?
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Old 03-06-2021, 05:23 AM   #6
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No, none in Ohio
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Old 03-09-2021, 09:53 PM   #7
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I am pretty sure you only have 2 O2 sensors from factory, nothing downstream of the cat. It will run just fine with no codes until you "get around" to replacing it. Being a 99 it wasn't doing much anymore, except possibly plugging up your exhaust if starting to melt down.
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