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Remove Catalytic Converter

Tiny
SERCHING4SOMETHING
  • MEMBER
  • CHEVROLET BLAZER
If you replace the Catalytic Converter with a straight pipe on a 2002 Chevy Blazer 4.3 with 112000 miles, how do you stop it from throwing the Check Engine light without affecting other check engine signals?
Tuesday, September 25th, 2007 AT 2:29 PM

9 Replies

Tiny
DENNYP
  • MECHANIC
  • 1,824 POSTS
Hello,

You cant get the check engine light to go out without the catalytic converter unless you have a hackbox of some kind.

This video will show you how to replace the Y pipe with cats on a similar vehicle.

https://youtu.be/CORe9JyrexI

Please run down this guide and report back.
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Friday, September 28th, 2007 AT 7:08 PM
Tiny
JAULT01
  • MEMBER
  • 51 POSTS
It's illegal. Besides, it will throw codes because the back O2 sensor checks emissions and adjusts fuel etc from that data.
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Monday, November 22nd, 2010 AT 5:08 AM
Tiny
EMACK88
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET BLAZER
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
It seems the converter has no bolts to remove it what do I do
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Saturday, April 13th, 2019 AT 6:26 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
If it is not a bolt up type, it will have to be cut out and a new cat welded in place, if you do not have the equipment this is a job for a mechanic or an exhaust fitter, the labour charge should be about 1/2 hr max.
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Saturday, April 13th, 2019 AT 6:26 PM (Merged)
Tiny
KABBOTT1886
  • MEMBER
  • 1 POST
  • 2001 CHEVROLET BLAZER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 116,450 MILES
Was just told that we need a catalytic converter. Our blazer has two of them and was also told that we can remove the one in the front part of the car and we won't have a problem.
Is it ok to remove the converter and not cause a problem with the car?
It won't do any damage to run without it will it?
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Saturday, April 13th, 2019 AT 6:26 PM (Merged)
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
I would not suggest permently removing cat converters. If they need to be replaced, I would suggest replacing them
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Saturday, April 13th, 2019 AT 6:26 PM (Merged)
Tiny
DUCK
  • MEMBER
  • 1 POST
  • 1997 CHEVROLET BLAZER
  • 13,000 MILES
1997 chevy s10 blazer code p0420 def. Catayst below threshold bank 1. What does this mean?
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Saturday, April 13th, 2019 AT 6:26 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The catalytic converter isn't functioning within the specifications set by the manufacturer. It could be a vacuum leak, bad O2 sensor, or a bad converter.
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Saturday, April 13th, 2019 AT 6:26 PM (Merged)
Tiny
CHRIS DIVITO REBECCA DHALIWAL
  • MEMBER
  • 1 POST
Check this out..........

https://www.youtube.com/watch?v=19CWNNBCv-Q
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Monday, August 14th, 2023 AT 7:36 AM

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