Failed Emission Test

[Peter Berrevoets]

Not using premium fuel for the test are you?

And don't put in that can of octane boost either.

Both will give you lots of power and a clean burn under load, but will
contribute to failure at idle.

HTH

Peter Berrevoets
1990 200TQ
Toronto, Canada
http://frontpage.home.net/pjberr/

-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of edwulf
Sent: Tuesday, July 03, 2001 4:58 PM
To: quattro at audifans.com
Subject: Failed Emission Test


Ok, Guys and Gals,

I need some quick input.  As is typical, for me, I've put off emmissions
testing until the last second.  Now, the '89 100 2.3 auto non quattro has
failed.  Here's the info:

Hydrocarbons Loaded Test: Pass
    standard = 220ppm  -  my reading = 91ppm
Carbon Monoxide Loaded Test:  Pass
    standard = 1.2% - my reading = .33%
Hydrocarbons Idle Test: Fail
    standard = 220ppm  -  my reading = 379ppm
Carbon Monoxide Idle Test: Pass
    standard = 1.2% - my reading = .04%

Car has new Bosch plugs, cleaned throttle body last week, has been driving
well, self diagnostic = 4444 (good).  Air Cleaner less than 6 months old.
But, the idle has been a bit rough over the past month.  I'm thinking - Idle
Stabilizer Valve.  Wouldn't that set a trouble code?  My other thought, iffy
O2 sensor.  Wouldn't that, also, set a trouble code?  Since I've had it, I
have not replaced the plug wires, cap, rotor, nor have I done the timing
belt, if that makes any difference.

Any Thoughts?

Thanks,

Eric Wulf
'89 100