[s-cars] my '92 failed smog

[Kent McLean]

Theodore Chen wrote:
> here are the numbers:
> idle (792 rpm) CO2 14.3% O2 0.70%, HC 211ppm (max 120) CO 0.11% (max 1.00)
> 2512 rpm CO2 14.4% O2 0.40% HC 68ppm (max 140) CO 0.32% (max 1.00)

Googling: emissions "high hc"
yields these links:

http://www.nichols.nu/tip517.htm
http://en.allexperts.com/q/Toyota-Repair-832/Failed-Calif-Emissions-HC.htm
http://autotechrepair.suite101.com/article.cfm/a_question_about_a_question

They seem to agree on incomplete combustion due to a misfire, and to
check everything in the ignition system - plugs, wires, etc., including
the O2 sensor. My Audi specific guess would be a POS starting to fail.

Another point they make is a too-lean mixture caused by a vacuum leak,
so check all your hoses.

Pulling the DTC codes wouldn't hurt, either.

-- 
Kent McLean
'99 A4 Avant, w/ quattro, V6, Tiptronic, :)
'91 200 TQA #1, backup car
gone but not forgotten:
'94 100 S Avant, "Moody", now with new owner
'91 200 TQA #2, up in smoke 2
'89 200 TQ, "Bad Puppy", up in smoke