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'91, smog question
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CarGuru > Mazda > '91, smog question 5 February 2005 23:36:56

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'91, smog question

Art McGinn 29 January 2005 07:10:04
 just barely flunked ca smog test due to slightly -- very slightly --
over-the-limit nitrogen oxide at idle (while o.k. at 25 mph). the technician
(it was a "test only" facility) said he suspected the oxygen sensor needed
replacement. everything else tested fine. any other thoughts out there
before i start throwing money at it? many thanks. art



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Scott 29 January 2005 07:44:06 permanent link ]
 I am just curious, are you in an area that requires the newer testing,
the one that places the rear wheels on rollers?

Art McGinn wrote:> just barely flunked ca smog test due to slightly -- very slightly -- > over-the-limit nitrogen oxide at idle (while o.k. at 25 mph). the technician> (it was a "test only" facility) said he suspected the oxygen sensor needed> replacement. everything else tested fine. any other thoughts out there> before i start throwing money at it? many thanks. art>


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Leon van Dommelen 29 January 2005 19:09:06 permanent link ]
 "Art McGinn" <ajmcginn@earthlink­.net> wrote:
just barely flunked ca smog test due to slightly -- very slightly -- >over-the-limit nitrogen oxide at idle (while o.k. at 25 mph). the technician>(it was a "test only" facility) said he suspected the oxygen sensor needed>replacement.­ everything else tested fine. any other thoughts out there>before i start throwing money at it? many thanks. art

The good news is, aftermarket oxygen sensors for the early miatas
are cheap, though you have to splice them in.

Leon

--
Leon van Dommelen :)­ Bozo, the White 96 Sebring Miata .)
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Art McGinn 5 February 2005 23:36:56 permanent link ]
 turned out it needed a new catalytic converter, second one in two years,
with which it passed smog test. no one was quite sure why a cat would become
ineffective after only two years. but...calif. has new equipment that, for
the first time, tests for nitrogen oxide (which the miata had flunked, just
barely). the new equipment makes it even harder for a car, especially an
older one, to pass the smog test. the newly installed cat employs a
different technology, also, which evidently does a better job with the n.o.
hey, all ya gotta do is throw a few bills at it and the problem goes away.
art


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CarGuru > Mazda > '91, smog question 5 February 2005 23:36:56

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