Date: Tue, 15 Apr 2003 09:17:21 -0400
Reply-To: Jay L Snyder <Jay.L.Snyder@USA.DUPONT.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Jay L Snyder <Jay.L.Snyder@USA.DUPONT.COM>
Subject: Re: 82 Failed CA Smog Test- help!
Content-Type: text/plain; charset=us-ascii
Just wondering if anyone has a feeling for where the mixture screw is set
from the factory. How many turns out from fully closed? Looking for a
ballpark adjustment to start with.
Jay '85 Westy
Bill Collins <wb6otg@INTREX.NET>@gerry.vanagon.com> on 04/15/2003 09:04:12
AM
Please respond to Bill Collins <wb6otg@INTREX.NET>
Sent by: Vanagon Mailing List <vanagon@gerry.vanagon.com>
To: vanagon@GERRY.VANAGON.COM
cc:
Subject: Re: 82 Failed CA Smog Test- help!
You should be able to easily meet 2% CO without a cat. (Are you sure the
limit is 2%? We have to be under 1.5% (or so) here in NC.
Your idle CO reading says the engine is running rich at idle. This can be
caused by oil that is contaminated with gas, bad O2 sensor, improper
adjustment of the idle mixture, leaky injector(the injector leaking fuel
into the engine, not a bad seal leaking air), and probably a bunch of
things I forgot. The tune up work you suggest (plus changing the O2
sensor) is a good idea, but also having the idle mixture adjusted by
someone who can measure the CO would make it more likely to pass.
Bill
--------------------------
I've had several mechanics tell me to run a couple of tanks of High
Octane before getting smoged. Also, when was the last time a new Cat
was put on--it might be time.
Richard
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of S.Harrison
Sent: Monday, April 14, 2003 9:03 PM
To: vanagon@GERRY.VANAGON.COM
Subject: 82 Failed CA Smog Test- help!
82 Vanagon Westy. 89K on original engine.
Took it to a local garage that is certified to smog test vehicles up for
the
CA biennial inspections. Drove it for a about 2 hours prior so it was
good
and warmed-up.
I passed all aspects of the test but the CO% at idle -- I was at 5.56%,
with
a maximum allowable of 2.00. The CO% at 2500 RPM measurement was fine,
about
0.62%.
So what could help? I'll be changing the oil and filter, installing new
plugs, cap, rotor, and points before the next check, but any ideas on
how I
can lower the CO percentage? Could the AFM be at fault? Leaky injector
seals?
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