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-   -   o2 senor question (http://67-72chevytrucks.com/vboard/showthread.php?t=663743)

IIRoccoII 03-16-2015 08:09 PM

o2 senor question
 
If i delete my cats how could i stop the check engine lights

piecesparts 03-17-2015 03:37 AM

Re: o2 senor question
 
What year truck? Does it run on a computer chip or is it a tuneable computer setup?

IIRoccoII 03-17-2015 05:39 AM

Re: o2 senor question
 
It's a 1993 TBI 350 engine

iluvmy72 03-17-2015 12:42 PM

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.

95 S_Trucker 03-17-2015 01:47 PM

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.

OutlawDrifter 03-17-2015 03:33 PM

Re: o2 senor question
 
+1 on a heated o2 sensor.

iluvmy72 03-17-2015 03:44 PM

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.

likaroc13 03-19-2015 04:41 AM

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.:uhmk: Made it a little louder, but it didn't hurt performance or gas mileage at all in my case.

speedygonzales 03-19-2015 03:31 PM

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.

Harley03joe 12-06-2017 03:52 AM

Re: o2 senor question
 
Quote:

Originally Posted by 95 S_Trucker (Post 7094276)
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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