Actually, excessive HC is usually indicative of a mis-fire condition or
leaky valves, usually exhaust. Rich mixture will show as excessive CO.
The borderline NOX reading here indicates the catalyst is shot and or
the ignition timing is too advanced. The good Co reading indicates the
mixture is probably where it should be. With the nigh NOX, my forst
choice would be to replace the Cat.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Frank Condelli
Sent: Saturday, March 06, 2004 6:49 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Emissions testing 2.1

In a message dated 05/03/2004 2:33:41 PM Eastern Standard Time,
josorio@atlas.kennesaw.edu writes:

While we  are on this subject, I just went thru the same deal here in
Boston. As I  was expecting I didn't pass emissions although the only
item
I failed was  the "HC GPM" My reading was 05.31 and the limit is 03.20
Any
Ideas?

FYI my other readings were:

CO GPM    Reading: 020.61 Limit: 080.00 PASS
NOX GPM  Reading: 06.51   Limit: 07.00  PASS
CO2 GPM  Reading:  369.81

Jorge, HC reading is  the hydro carbons reading.  It is high which
indicates
the engine is  running too rich a fuel mixture.  Therefore you need to
check
all the  components on the engine that control the information sent to
the
computer which  in turn tell the computer how to adjust the fuel
mixture.
Throttle  position switch, Temp II switch, AFM, Oxy sensor, CAT, exhaust
system
leaks, air  intake leaks, vacuum leaks, air filter, timing, cap & rotor,
ignition
wires  ignition coil, ground wires, and ultimately the condition of the
motor.
Cheers,

Frank  Condelli
Almonte, Ontario, Canada
_BusFusion_ (http://members.aol.com/BusFusion/bfhome.htm)  a VW Camper
camping event, Almonte, ON, June 10 ~ 13, 2004
'87 Westy & Lionel  Trains
Member: _Vanagon List_ (http://www.vanagon.com/) , _LiMBO_
(http://www.bcn.net/~limbo/) , _IWCCC_ (http://www.westfalia.qc.ca/)  &
_CCVWC_
(http://www.ccvwc.ca/)
Vanagon/Vanagon Westfalia Service in  the Ottawa Valley
_STEBRO/Vanagon Stainless Steel  Mufflers_
(http://members.aol.com/Fkc43/stebro.htm)
_Frank Condelli &  Associates_
(http://members.aol.com/Fkc43/busindex.html)
or  http://frankcondelli.com