Date:         Thu, 26 Aug 2004 19:03:54 -0400
Reply-To:     Dennis Haynes <dhaynes@OPTONLINE.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <dhaynes@OPTONLINE.NET>
Subject:      Re: emission failure, HC 229 @ idle (ok @ 2500 rpm)
Comments: To: FoxhntrPat@AOL.COM
In-Reply-To:  <198.2dab4339.2e5f585f@aol.com>
Content-type: text/plain; charset=US-ASCII

You don't mention what the acceptable limit is in your state. In New
York it is 220 for an 87 so your close. Makes sure the timing is
properly set, not over-advanced and set the idle speed to 950-1,000 rpm.
Yes this is above the idle stabilizer attempted 800-850. The extra air
will reduce the HC significantly. As the vans get older, the poorly
designed intake manifold and injector differences will cause some
cylinders to have the mixture slightly out of balance. This results in a
lean mis-fire at low idle causing the excessive CO. If still no good,
check compression-leak down looking for valve problems. Next step is the
catalytic converter.

Dennis


-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Pat Horrocks
Sent: Thursday, August 26, 2004 11:15 AM
To: vanagon@GERRY.VANAGON.COM
Subject: emission failure, HC 229 @ idle (ok @ 2500 rpm)

ok, Volks- plugs, dist. cap, rotor and/or oxygen sensor or cat.
converter
(PASSed on report...), or ......?

CO PASSed (.15 @ idle, .44 @ 2500 rpm).  Everything else VALID, N/A or
PASSed.

Of course, I need my registration by Tues......

-P ('90 syncro westy)