replaced the cat two years ago when the van passed with flying colors, I guess I was overly confident going into this last test. heck I was well under the average numbers on the previous smog test. so you suggest replacing the O2 sensor......

paul

----------------------------------------

                                From: "Dennis" <d23haynes57@hotmail.com>

Sent: Saturday, March 31, 2007 1:09 PM

To: "'wognacious'" <wognacious@EWNET.NET>, <vanagon@GERRY.VANAGON.COM>

Subject: SPAM-MED:  RE: Failed CA Smog 

The CO reading of 1.10 is saying that your O2 sensor is not working. The

High HC is slightly related or you have a miss fire. The O2 sensor should

be regulating the Co at about .5-.6. If the Cat is working, it should be

further reduced to almost "0". Yes, these numbers indicate a Cat. That

would show up on a dyno test as an NOx failure.

Dennis

-----Original Message-----

From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of

wognacious

Sent: Saturday, March 31, 2007 11:07 AM

To: vanagon@GERRY.VANAGON.COM

Subject: Failed CA Smog

Just 2 years ago this van passed with flying colors this time no go.

Passed the 15 mph failed the 25 mph HC and CO

HC max is 103 I measured 190

CO max is 1.10 I measured 1.12

the only thing I have noticed is that my throttle position switch has been

acting up recently, but that is at low rpms. any thoughts or suggestions

will be greatly appreciated. I have a new TPS and will install today also

I didn't do a plug or oil change prior to the test, would that matter or

help?

TIA,

paul rogers

85 westy