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duderanchero
Samba Member
Joined: October 25, 2008
Posts: 166
Location: el paso, tx
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 Posted: Wed Jan 27, 2010 7:42 pm Post subject: Emissions fun-time |
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This afternoon, i poured a pint of Seafoam into the gas tank and headed down to the vehicle inspection station. It failed, as I half-expected it would, but my high-RPM emissions were actually well below the limit--around 140 ppm (220 is the cut-off). However, my emissions when idling were several times the limit (1050 ppm). My idle is set a little high (around 1000), but I don't think this would explain such a dramatic difference. Anyone have any tips/tweaks? I'd very much appreciate your insights.
Please no "USE THE SEARCH FUNCTION" responses. That's what I've been doing for the last hour. If you know of a relevant thread, please link me to it.
Thanks,
J
1991 Vanagon Carat, 2.1L |
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duderanchero
Samba Member
Joined: October 25, 2008
Posts: 166
Location: el paso, tx
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| Posted: Wed Jan 27, 2010 10:49 pm Post subject: |
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I should point out that those levels were for hydrocarbons. My CO output is fine--low, in fact (.18% at high RPMs, .24% at idle).
I notice now that my air (O2) readings are 3.4% at high RPM, 5.4% at idle. I have no idea what these should be, but it seems that they should be about the same whether idling or revving. I did replace the O2 sensor, but maybe I need to replace it again.
I was trying to pass inspection before I leave for Colorado tomorrow. Guess I'll have to take the 4Runner 
J |
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firepilot
Samba Member
Joined: February 10, 2009
Posts: 273
Location: Boise
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| Posted: Wed Jan 27, 2010 11:05 pm Post subject: |
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Yeah I am going thru that too. My HC pass at 2500rpm, but fail at idle
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86 Westy Syncro |
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wgargan
Samba Member
Joined: September 21, 2002
Posts: 871
Location: Dreaming of the Rockies
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| Posted: Thu Jan 28, 2010 5:57 am Post subject: |
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does the catalytic converter affect hydrocarbons? maybe its not hot enough during idle?
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Current ride:
1983.5 Watercooled Vanagon 'L' Automatic transmission |
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r39o
Samba Polizei
Joined: May 18, 2005
Posts: 9800
Location: San Diego
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| Posted: Thu Jan 28, 2010 11:45 am Post subject: |
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What was you NO doing?
Frequently, all you need is a fresh cat. But, it could be lots of things.
Every few years I need a fresh cat. But, the cat situation might be harder now. I do not know. Mine is held in with stainless fasteners and anti seize. Comes out in minutes instead of the hours it used to fighting rusty fasteners.
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"Use the SEARCH, Luke" But first visit the Vanagon FAQ!
1990 Multivan EJ 22, Rancho trans 0.82 4th, Small Car front AC, CLKs w/ 215/65-16, homemade big brakes 303mm, Konis, Recaros, etc....
Click to see my ads for Cup holders, Subaru clutch fix and CLK wheels (no wheels currently) |
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