1986 Other Toyota Models Failed Smog test in California

Tiny
TOYOTAALLEY
  • MEMBER
  • 1986 TOYOTA
  • 4 CYL
  • 4WD
  • MANUAL
  • 120,000 MILES
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.
Friday, September 11th, 2009 AT 2:01 AM

1 Reply

Tiny
RASMATAZ
  • 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.
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Friday, September 11th, 2009 AT 6:26 AM

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