The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1988 - 1998 Chevy & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-16-2015, 08:09 PM   #1
IIRoccoII
Registered User
 
Join Date: Apr 2013
Location: lucedale
Posts: 11
o2 senor question

If i delete my cats how could i stop the check engine lights
IIRoccoII is offline   Reply With Quote
Old 03-17-2015, 03:37 AM   #2
piecesparts
Parts and more parts
 
piecesparts's Avatar
 
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,830
Re: o2 senor question

What year truck? Does it run on a computer chip or is it a tuneable computer setup?
__________________
Frank
piecesparts is offline   Reply With Quote
Old 03-17-2015, 05:39 AM   #3
IIRoccoII
Registered User
 
Join Date: Apr 2013
Location: lucedale
Posts: 11
Re: o2 senor question

It's a 1993 TBI 350 engine
IIRoccoII is offline   Reply With Quote
Old 03-17-2015, 12:42 PM   #4
iluvmy72
Registered User
 
Join Date: Jan 2002
Location: Springville, UT, USA
Posts: 1,009
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.
iluvmy72 is offline   Reply With Quote
Old 03-17-2015, 01:47 PM   #5
95 S_Trucker
Senior Member
 
95 S_Trucker's Avatar
 
Join Date: Oct 2009
Location: Lancaster, PA
Posts: 1,624
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.
__________________
-99 K2500 LS CCSB 7.4
-96 C3500 HD 7.4 NV4500 Rollback

My 85 Project: http://67-72chevytrucks.com/vboard/s...d.php?t=368864

78 Big10 Project: http://67-72chevytrucks.com/vboard/s...d.php?t=383629

96 Project: http://67-72chevytrucks.com/vboard/s...d.php?t=614515
95 S_Trucker is offline   Reply With Quote
Old 03-17-2015, 03:33 PM   #6
OutlawDrifter
Senior Member
 
Join Date: Aug 2012
Location: Northeast KS
Posts: 1,048
Re: o2 senor question

+1 on a heated o2 sensor.
__________________
2010 Chevy 2500HD Z71 CCSB, 6.0L/6L90E, 3.73, G80
1991 Z/28, 6.0L/T56...I think it has a cam.....
1949 GMC 250, S10 Frame, 6.0L/4L80E
Replaced:
1979 Bonanza K10 RCLB 350/350/NP203 3.42's
1982 K5 Sierra Classic 2WD, 350/350, 2.73's
1995 GMC RCSB 2WD, 5.7tbi/4L60E, 3.42's
1998 Chevy K1500 Z71, 5.7L/4L60E, 3.43's
OutlawDrifter is offline   Reply With Quote
Old 03-17-2015, 03:44 PM   #7
iluvmy72
Registered User
 
Join Date: Jan 2002
Location: Springville, UT, USA
Posts: 1,009
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.
iluvmy72 is offline   Reply With Quote
Old 03-19-2015, 04:41 AM   #8
likaroc13
Rollin' Old Skool
 
Join Date: Jun 2007
Location: Spring Hill, TN
Posts: 4,915
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.
__________________
_____________________________________________
Phillip

My Build threads:
1966 Chevy C-10 "Black Betty"

shortbed, fleetside, BBW, 327 V8/ Powerglide (under construction)
http://67-72chevytrucks.com/vboard/s...ighlight=betty

1997 Chevy Tahoe, 2dr/2wd, mild custom (Daily driver)
http://67-72chevytrucks.com/vboard/s...d.php?t=601142

Pics:
'66 C-10 https://flic.kr/s/aHsjHWD4h9
'97 Tahoe https://flic.kr/s/aHsjGZ7wKP
'93 C-1500 https://flic.kr/s/aHskxdpdnQ
'88 S-10 Blazer https://flic.kr/s/aHsjYGx4Md

Previous Rides:
1993 Chevy S-10 ext. cab, 4.3L, 4/5 drop (Sold)
1993 Chevy C-1500 short/step Retro-Rod (Sold)
1988 S-10 Blazer 2dr/2wd mild custom (Sold)
likaroc13 is offline   Reply With Quote
Old 03-19-2015, 03:31 PM   #9
speedygonzales
Registered User
 
speedygonzales's Avatar
 
Join Date: Jan 2006
Location: Smithfield, VA
Posts: 1,256
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.
__________________
99 Z71 (98 body style)
Pride and joy
speedygonzales is offline   Reply With Quote
Old 12-06-2017, 03:52 AM   #10
Harley03joe
Registered User
 
Harley03joe's Avatar
 
Join Date: Apr 2016
Location: Miramar Florida
Posts: 134
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
__________________
1931 Ford Like New And For Sale
2004 Harley Davidson Heritage Classic
1987 Chevy R 10 Silverado
2007 Azera
2011 Cadillac CTS Premium
Harley03joe is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 04:42 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com