I have an astro with a p 420 catylitic converter low effitiency

2000 CHEVROLET ASTRO
145,000 MILES
Avatar
HORSESHOE
  • MEMBER
  • 7 POSTS
while driving engine slightly hasitates seems to indicate missfire
Nov 2, 2011 at 7:30 PM
Advertisement
Avatar
ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
cat has failed most likely from a missfire you have. the unburned fuel is what kills the converter.
i suggest you resolve the missfires and you will still most likely have to replace the cat as well.

Roy
Nov 2, 2011 at 7:33 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.