1986 Other Toyota Models Failed Smog test in California

1986 TOYOTA
120,000 MILES • 4 CYL • 4WD • MANUAL
Avatar
TOYOTAALLEY
  • MEMBER
  • 1 POST
It failed a smog test because of the EGR. Had the EGR completely redone, oil change, tune up and a new clutch put in.
It failed smog again because of the emissions this time.
What else can be wrong. Everything else passed. The emissions were over 700, but passed the first time before all the work.

Help.....
Sep 10, 2009 at 7:01 PM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,992 POSTS
NOX failures are usually EGR-related, since the EGR system is primarily responsible for reducing oxides of nitrogen. But NOX emissions can also be caused by a bad three-way converter or a computer control system that remains in open loop.
Sep 10, 2009 at 11:26 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.