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Any thoughts on my failing emissions results?

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Old 10-03-2005, 03:03 PM
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Default Any thoughts on my failing emissions results?

idle hc: 440ppm (220 limit)
CO% idle: 00.01 (1.20)
2,500 rpm HC 492 (220)
CO% 2,500 rpm 00.02 (1.20)

Is this a misfire? I have new MAF, plugs, O2 sensor, no codes etc. Smelled nice and clean when I left the house but after leaving the test it stank of gas.
Old 10-03-2005, 03:26 PM
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ever replace your coolant temp sensor?
Old 10-03-2005, 03:28 PM
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Tests ok per bentley
Old 10-03-2005, 03:48 PM
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which o2 sensor did you replace?
Old 10-03-2005, 04:25 PM
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only one 1995 S6
Old 10-04-2005, 06:33 AM
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hc can = gas...maybe cats? thank god we dont have emissions in michigan
Old 10-04-2005, 11:42 AM
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Default was the car fully warmed up before the test?

the coolant temp sensor might be worth replacing, its cheap enough.

also run some techron through and on the next tank use high octane gas before the test.
Old 10-04-2005, 05:05 PM
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Very, idled for an hour at the test station (probably not good), always use 93+, motor only has 30k
Old 10-04-2005, 05:06 PM
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pre or post cat?
Old 10-04-2005, 05:31 PM
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doesnt audi warenty emissions control to 10 years 100k?


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