Pontiac GTA Enhancement information and discussions with Technical DIY and performance tuning information for the hardcore Pontiac GTA Owners and Enthusiasts.
Forum | Register Now | Members | Search | How Do I... | Calendar

Go Back   The GTA Source Page Message Forums > GTA SPECIFIC > GTA TECH

GTA TECH Want to discuss technical topics about your GTA.... engine tuning, mechanical upgrades, problem areas, etc.? Then post it HERE!

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 07-14-2017   #1
89-5.7GTA
Tony
 
Join Date: Jul 2009
Location: Rocky River Ohio
Posts: 304



GTA Year: 1989
GTA Engine: 350 TPI Automatic
Opinions/Advice re: catalytic converters

My car is a 1989 5.7 with dual cats. Car has 71,000 miles. Original cats replaced about 2 years ago - had loud rattling sound and one had physical damage from a speed bump. Local muffler shop replaced them with no name economy cats. Now these things are rattling like marbles in a coffee can (the old metal kind). The shop replaced the one we thought was making the noise at no charge. Still rattling so the other one must be bad also. I've put on less than 1000 miles on the first replacement cats. The car runs very well with no issues and no SES light. I don't know what is causing the cats to fail so soon, other than their poor quality.

The car is over 25 years old and is exempt from emissions inspection. I am considering removing the cats and replacing with straight pipes. (For off-road use only!). I don't intend to sell the car, but if I did I would disclose the lack of cats to a buyer. Has anyone removed the cat(s) from these cars? Are there any engine/drivability issues that result from this? Will it set off an SES light? (No O2 sensor post cat, so I doubt it, but…).

If anyone has any experience with deleting the cat(s) on these cars I'd appreciate your input.
__________________
L98
700R4
3.27

Last edited by 89-5.7GTA; 07-14-2017 at 11:11 AM.
89-5.7GTA is offline   Reply With Quote
 

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Catalytic Converters irritated_cube GTA TECH 8 10-30-2010 01:42 AM
dual catalytic converter system george88gta GTA TECH 5 01-27-2009 07:50 PM
High Preformance Catalytic Converters highway431 GTA TECH 2 04-14-2003 03:52 PM
catalytic converter REMOVED USER GTA TECH 9 12-19-2001 12:39 PM
catalytic converters 90GTA GTA TECH 2 10-17-2001 07:14 AM


All times are GMT -5. The time now is 12:04 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.