Given your fan running at high speed, I'd guess you are running lean, which makes the engine run hot and create more NOX. Most likely a bad oxygen sensor. More here: http://www.smogtips.com/failed-emissions-test.cfm Good luck! I'm so glad I don't have to deal with this anymore! Stuart '85 Westy, past needing inspection in WA -----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of David M Sent: Saturday, June 15, 2013 12:43 PM To: vanagon@GERRY.VANAGON.COM Subject: Emissioins test failure My 1987 Vanagon failed its Arizona emission test this morning. Results were Hydrocarbons (HO) grams/mile .75 limit 1.60 (passed), CO grams/mile 25.73 limit 15 (failed), NOX grams/mile 2.91 limit 2.5 (failed). I have the standard printed list of what might cause these results. The last time it failed 2 years ago, it failed only the NOX reading and I had to get a new catalytic converter that cost over $500 I've noticed the low-speed engine fan comes on a lot more than it used to and sometimes it even goes to high-speed which is a scary thing because it makes the entire vehicle vibrate and I can feel it through the gas pedal. According to the testing station you can request a second-by-second graph of the emissions test but they will only fax it to a repair shop. |
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