removing cat?
Thread Starter
Member
Joined: Jan 2010
Posts: 314
Likes: 0
From: Pasadena, TX
Car: 1991 Formula
Engine: 350TBI
Transmission: 700r4
Axle/Gears: 2.73
removing cat?
Would my SES light come on if i removed my car? i know it will give me bad emissions but will the light turn on?
Banned
iTrader: (12)
Joined: Jul 1999
Posts: 12,212
Likes: 13
From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: removing cat?
Possibly. And it would be tampering with Federal Emissions on a street car. If it is bad? Get a high flow cat, but don't take off a good cat.
Re: removing cat?
Last edited by DJP87Z28; Jul 9, 2010 at 07:02 PM.
Moderator




Joined: Jul 2001
Posts: 5,225
Likes: 70
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Re: removing cat?
You are not going to get a SES light. It's not going to give you a lot of problems if you do. As stated above, it is illegal to do. It also will make your exhaust much "stronger" smelling.
Joined: Feb 2001
Posts: 13,758
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
Re: removing cat?
Correct. There aren't any rear 02 sensors on these cars to detect cat temperature, which is what would trip an code on a modern car. Ditto on the emissions. Modern cats do not rob power. Improper exhaust size does.
Supreme Member
iTrader: (1)
Joined: Nov 2008
Posts: 1,697
Likes: 2
From: Michigan
Car: 86 IROC Z, 92 RS
Engine: 305 4bbl, 305 TBI
Re: removing cat?
My cats are hollow. They look like cats, but are empty. I have no problems with performance, or or lights coming on, but I probably have a strong exhaust smell. I am going to get around to putting high flow cats on them. I grew up when catalytic converter wasn't even a word, so you probably know what my gut feeling is about the EPA.
Trending Topics
Member

Joined: Jul 2010
Posts: 279
Likes: 1
From: Oakland, CA
Car: 2000 Camaro SS/86 Iroc/89 Iroc(x2)
Engine: LS1
Transmission: 6 Speed
Axle/Gears: 4.10
Re: removing cat?
x2. You're better off leaving it in unless it's bad, then you may as well get a high flow... but if you have a sniffer test in your state it may not pass emissions.
Re: removing cat?
My cats are hollow. They look like cats, but are empty. I have no problems with performance, or or lights coming on, but I probably have a strong exhaust smell. I am going to get around to putting high flow cats on them. I grew up when catalytic converter wasn't even a word, so you probably know what my gut feeling is about the EPA.
keep it green...keep it shiny
Thread
Thread Starter
Forum
Replies
Last Post






