Posted to Emissions Forum on 12/23/2012
Conflictling info ... WWYD?
Good morning everyone.
It doesn't happen to me as often as it did in my earlier
years, but I still get annoyingly confused at a process that
should be "cut-and-dry" ... an emissions inspection.
I have attached three different VIRs for the same vehicle,
spanning a period of about 90 days. My question to you
esteemed professionals is "Why are the Visual/Functional
Sections so different?"
[1990 Nissan 300ZX 2+2, Emissions Infrared Data]
[1990 Nissan 300ZX 2+2, Emissions Infrared Data] [1990
Nissan 300ZX 2+2, Emissions Infrared Data]
I think that I know why the October VIR had passing
emissions: the tech entered it as a single exhaust and
probed the right bank only, which is much cleaner than the
My MOTOR ECS says one cat, supporting the October "visual
tamper" result. Alldata says dual cats, supporting the
September and December visual "passes".
I had no trouble finding an EVAP pinch point and checking
the ignition timing on this vehicle. What is with all the
weirdness from the other two techs (or am I the weirdo)? And
shouldn't a referee be a little bit more thorough at
tracking down pinch points and timing specs? Alldata clearly
spells out the procedure for checking AND ADJUSTING the
timing on this vehicle (COP with adjustable cam sensor).
Aren't these tests supposed to be repeatable, to support the
so-called "validity" of the CA STAR FuPR "calculation"? I
(for one) am skeptical.
I know that you guys and gals can't see this car with your
own eyes, but do you have any informed views about which of
us is right or wrong? I believe that 2 or 3 of us messed up
the test, and zero or one of us did it correctly. I promise
that I won't be offended if you think that I'm one of the
screw-ups; the STAR program long-term measure has already
been there and done that.
Quick Stop Smog & More
Sacramento, California, USA
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