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Old 03-16-2015, 08:09 PM   #1
IIRoccoII
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o2 senor question

If i delete my cats how could i stop the check engine lights
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Old 03-17-2015, 03:37 AM   #2
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Re: o2 senor question

What year truck? Does it run on a computer chip or is it a tuneable computer setup?
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Old 03-17-2015, 05:39 AM   #3
IIRoccoII
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Re: o2 senor question

It's a 1993 TBI 350 engine
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Old 03-17-2015, 12:42 PM   #4
iluvmy72
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Re: o2 senor question

If it's stock it should only have 1 cat and 1 sensor. You might need to have a custom computer setup. If you are trying to improve gas mileage, you won't see any except a higher bill for the deleting.
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Old 03-17-2015, 01:47 PM   #5
95 S_Trucker
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Re: o2 senor question

You might have false oxygen sensor readings.

The cat will have a small amount of back pressure. That will keep some heat in the exhaust for proper oxygen sensor readings. If you remove the cat, it will let the exhaust escape faster, and the heat will not stay in the pipe long enough to keep the sensor at the correct temp.

You can correct all of that by using a heated oxygen sensor.
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Old 03-17-2015, 03:33 PM   #6
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Re: o2 senor question

+1 on a heated o2 sensor.
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Old 03-17-2015, 03:44 PM   #7
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Re: o2 senor question

have you had it scanned yet for the code? if I remember right you can take a paper clip to do this at home. But its been a while.
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Old 03-19-2015, 04:41 AM   #8
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Re: o2 senor question

On my old '93 C1500 with 350 TBI, I had the cat deleted. It never showed a check engine light. I know I personally didn't do anything to remove codes, & I don't recall the shop that did the cat-delete doing anything either. Made it a little louder, but it didn't hurt performance or gas mileage at all in my case.
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Old 03-19-2015, 03:31 PM   #9
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There is none

After Cat O2 sensors did not come along till 1996 with the advent of OBDII.

So hack away.

If anyone wants to know you get rear O2 simulators that connect in parallel to the O2 sensors to make the ECM think they are working. I used them for years until I had them programmed out.
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Old 12-06-2017, 03:52 AM   #10
Harley03joe
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Re: o2 senor question

Quote:
Originally Posted by 95 S_Trucker View Post
You might have false oxygen sensor readings.

The cat will have a small amount of back pressure. That will keep some heat in the exhaust for proper oxygen sensor readings. If you remove the cat, it will let the exhaust escape faster, and the heat will not stay in the pipe long enough to keep the sensor at the correct temp.

You can correct all of that by using a heated oxygen sensor.
Well I Just Looked For A Heated 02 Sensor For My 87 Chevy R 10 Silverado
Ans Every Place I Looked It Said >>>This part is not compatible with 1987 Chevrolet R10 Silverado Standard Cab Pickup 2-Door 5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated.

Do You Have A Part # For Me To Look At ??
Thank You Harley03joe
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