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Old 01-31-2009, 11:27 AM   #1
cyberdos OP
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Failed Emission Inspection

On my VFR.



So now what?

The reading stated that the Hydrocarbons in PPM were high.

What the hell does that mean and how do I fix it? I've got 60 days to go back so they wont charge me for another test.
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Old 01-31-2009, 12:34 PM   #2
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la mordida
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Old 01-31-2009, 12:35 PM   #3
Santa
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emissions on a VFR? when did that become a requirement?
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Old 01-31-2009, 12:56 PM   #4
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Quote:
Originally Posted by Santa
emissions on a VFR? when did that become a requirement?
Phoenix and Tucson only. I think they've been doing it for a while.
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Old 01-31-2009, 12:57 PM   #5
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Unburned fuel in the exhaust, is the could be anything from a weak spark, plugged air filter etc.

Try a full tune up and get a retest
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Old 01-31-2009, 01:16 PM   #6
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On cars I uses AC DELCO Upper Combustion Chamber Cleaner. If there is carbon deposits in the combustion chamber it will give you a high HC reading. It does make the vehicle run hot when using it but it does work.

To use it (on a cage) get the engine to normal operating temperature, run engine at medium idle and spray into the intake until the can is empty, shut the engine off for 15 minutes, start engine and blow out deposits from combustion chamber.

You can also use "Guaranteed to Pass" which is a fuel additive. Both products I've used on fleet vehicles I used to maintain.

Now, I have no idea IF these products would be safe for your VFR, but I'd try the AC Delce CCC, just use maybe 1/4 of the can. I've used it on small engines that have seen little maintenance prior to doing a tune-up on them and can say that it does clean some of the carbon off the sparkplug. I'm very carefull when I use the stuff though.

Oh, and you may want to pull the O2 sensor and look at it too...they can provide false voltages if contaminated.
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Old 01-31-2009, 04:21 PM   #7
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anyone try sea foam on bikes, i know it does wonders to cars.
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Old 01-31-2009, 04:55 PM   #8
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Quote:
Originally Posted by punkenduro
anyone try sea foam on bikes, i know it does wonders to cars.
I used it on my CB750. I'd notice that it would start running rough and stumbling, and I'd put a bit in the tank.

Haven't tried it with a fuel injected bike.
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Old 01-31-2009, 05:16 PM   #9
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High Hydrocarbons

High hydrocarbon readings on a gas analyzer are caused by unburnt gas, poor combustion. Poor combustion may be caused by: 1. an ignition problem (sparkplugs, wires, coil, primary ignition), 2. bad compression, 3. a vacuum leak (lean miss), timing too advanced, or a combination of all.
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Old 01-31-2009, 05:45 PM   #10
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On vehicles/bikes with all the emmision crap, carbon filters, vapor cannisters etc.. if the tank was just filled/overfilled, it can lead to higher hydrocarbon readings. Have it re-tested after a long "Brisk" ride with little or no low rpm operation and engine up to operating temp for a good period of time. Having a lower fuel level at time of testing will help as well.
Had the same thing happen on a 1991 suburban once. The above procedure cured the failed test. Hope the tester will work with you as the one I worked with.
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Old 01-31-2009, 06:05 PM   #11
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Pull the air cleaner and put some rubbing alcohol in the tank..

Works everytime..

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Old 01-31-2009, 06:23 PM   #12
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My XR650R did not pass the 1st trip. I leaned out the idle mixture untill it was actually a little ragged but at the right speed. It passed with flying colors.
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Old 01-31-2009, 08:20 PM   #13
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Dude, I don't know how you failed! My fire-breathing, no emission equipped 950 passed on the first try!!
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Old 01-31-2009, 08:21 PM   #14
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I've used high test gas and Mobil One Synthetic oil in cars before to pass the Cali Emmissions.

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Old 02-02-2009, 09:55 AM   #15
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Quote:
Originally Posted by Nightstalker
Dude, I don't know how you failed! My fire-breathing, no emission equipped 950 passed on the first try!!
out of all my bikes I never thought the Viffer would be the one not to pass an emissions test.

I'll do a full tune up and try again. She's due anyway.
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