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Date:         Mon, 7 Jul 2008 15:00:48 -0500
Reply-To:     Larry Alofs <lalofs@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Larry Alofs <lalofs@GMAIL.COM>
Subject:      Re: CA Smog Failed - 1985 1.9L
Comments: To: Walter Houle <whoule@ecscontrols.com>
In-Reply-To:  <vanagon%2008070714501123@GERRY.VANAGON.COM>
Content-Type: text/plain; charset=ISO-8859-1

Are you measuring the O2 sensor voltage with it connected in an operating engine? If the voltage is a "steady 0.55V" there is something wrong in the system. The voltage should be going up and down between about 0.1 and 0.9V.

Larry A.

On Mon, Jul 7, 2008 at 1:49 PM, Walter Houle <whoule@ecscontrols.com> wrote:

> Good news - I passed Test Number 4! NOx at 15 & 25 MPH went from 1497 to > 1074 and from 1090 to 326. The CO & HC numbers went slightly up and are > now "average". > > I spent a day checking everything and found two likely causes: The first > was a split connector on the aux. air regulator intake hose. The other was > an exhaust leak right at the flange where the two exhaust header pipes > combine into one. This was about 4" from the O2 sensor and was most likely > throwing it off. I installed a new O2 sensor. The old, (almost new) one > read from 0.48 to 0.52 V so it was probably OK. The new one read a steady > 0.55 V after the fixes. I installed some rebuilt injectors for good > measure. I didn't change the catalytic converter, but it is still suspect - > I just squeaked by with my 15 mph NOx number. Maybe next year. For the > record, it was made by Magnaflow. > > Thanks to all who answered - you gave me plenty of ideas and I learned > lots in the process. I am still kind of amazed that 2 local VW mechanics > didn't have the gumption to check for something as simple as intake & > exhaust leaks first. The $320 they cost me sure was a waste of time and > money! > > Walter > 85 Vanagon 1.9L >


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