O2 Sensor and no Cat

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Dec 16, 2003 | 07:08 PM

SFU666

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Heel & Toe

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From: POMONA NJ

O2 Sensor and no Cat

Has anyone, when eliminating the crap inside the catalytic converter used one of those bypass O2 sensors (the ones that tell the computer that everything is ok)? If so, whos got part Numbers, suppliers, or anything else of relevance?

Dec 16, 2003 | 07:16 PM

Team Owner

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From: Phila., PA burbs

Re: O2 Sensor and no Cat (SFU666)

I use a regular run of the mill 02 sensor in my car with no cats ands its been fine for a few years now. On an L98 the cat is downstream from the sensor so I don't think you'll have any problems. :yesnod:

Dec 16, 2003 | 11:31 PM

silver & red CE

Melting Slicks

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From: NW Chicago Suburbs

Re: O2 Sensor and no Cat (SFU666)

Quote:

...one of those bypass O2 sensors (the ones that tell the computer that everything is ok)?

You have an 86 Vette with a single O2 sensor. Gut your cat and leave the stock O2 sensor in place, it's independant of whether your cat is gutted or brand new. The O2 simulator is for 96 and up Vettes to trick the computer into thinking there's cats in place. It has nothing to do with an 86.

Eric

Dec 17, 2003 | 12:53 AM

Tourney3p0

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From: Warner Robins GA

Re: O2 Sensor and no Cat (SFU666)

:iagree:

I have no cats on my 88 and am running an O2 sensor. It's been this way for over a year and I've never gotten a code.

Oct 4, 2025 | 01:50 PM

LarrySe1340

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Quote:

Originally Posted by SFU666

go on the Internet and look up O2 sensor extender for 02 sensor spacer Walmart has it for $3.99

Last edited by LarrySe1340; Oct 8, 2025 at 11:01 AM. Reason: errors

Oct 7, 2025 | 07:08 PM

paraGoh

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Joined: Apr 2024

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Quote:

Originally Posted by SFU666

At one point I didn’t have a o2 bung on the passenger side so I stuck a paper clip from the driver side o2 computer pin to the Passanger side and it basically read as them being even. Which is a temporary fix. I looked for an actual eliminator for months and could only find one sketchy site that still sold them.

Oct 8, 2025 | 07:54 AM

Incorvettei

Drifting

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From: Marlton NJ

If the car is an 86 you should replace the O2 sensor, if original it is 40 (nearly) years old

Oct 8, 2025 | 10:56 AM

LarrySe1340

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Quote:

Originally Posted by LarrySe1340

go on the Internet and look up O2 sensor extender for 02 sensor spacer Walmart has it for $3.99. You only need to use the spacer on the downstream O2 sensors

Your 1988 Corvette with the L98 engine uses a single, upstream O2 sensor to monitor the exhaust before it enters the catalytic converter. Older vehicles like this generally did not use a second, or downstream, O2 sensor located after the catalytic converter.

Last edited by LarrySe1340; Oct 8, 2025 at 11:03 AM.