I think its always a good idea to change the oil before getting the
emissions checked
It can make the differance between pass and fail

Bob Donalds
Boston Engine

----- Original Message -----
From: "Dennis Haynes" <dhaynes@OPTONLINE.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, August 26, 2004 7:03 PM
Subject: Re: emission failure, HC 229 @ idle (ok @ 2500 rpm)

> 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)