Emissions Testing
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Joined: Jun 2005
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From: Bloomington Indiana
i know a little bit about chemistry, if your CO or Carbon Monoxide level is too high, that means that you are not getting enough oxygen to the fuel. its the same as a furnace, if its not well ventilated it will produce CO, if your car is running in the garage with the door closed, it will produce CO, because there is too much carbon dioxide and not enough oxygen
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From: Sussex County, DE
But if you look at his numbers, his O2 is very high at idle. Think about what makes an engine run like it's rich. How about EGR leaking in at idle? Slows the combustion process down if it is in too high a dilution, and definately is not wanted at idle. Perhaps the valve isn't fully seating. A second, less likely possibility is a misfire loading the catalyst with excess fuel, where it might burn incompletely and come out as high O2, High CO, (but not always high HC). But my money (all $0.53 of it) is on a sticky EGR. The rest of the numbers are great, so don't be too discouraged.
Dave
Dave
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I'll probably be attempting a second inspection in the next couple of days. Would using a regular paper air filter be better for this test or the K&N? I thought maybe the K&N would cause it to run richer, because of more air flowing through the mass air sensor. Any thoughts on that? The EGR valve has been replaced recently. Do you think it could still be the problem? How can I tell if the valve is being problematic?
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Just to follow up. My F150 passed emissions test today. I changed the thermostat, used a paper air filter instead of the K&N, ran low octane fuel, and ran that G2P product from CRC through the fuel before testing.
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I don't know what is in it. I know I'll be using that CRC stuff next year, if I can find it. Just as a precaution. I think what it really does is just clean combustion chamber and valves etc. I forgot to show the test results. The other variables weren't really altered. They showed that the CO was 1.18 at idle instead of the 1.31. The limit is 1.20. That was a close one.
Post Fiend
Joined: Mar 2003
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From: Sarnia, Ontario, CANADA!
My dad has a 1988 SuperDuty with a 460 in it. The things smokes BAD (needs new rings, goes through at least 1-2 quarts of oil per day in the summer).
He took it in for emissions testing and it failed, by a lot. So, he put the Guaranteed to Pass stuff in it and it passed with FLYING COLOURS. Weird, but it works.
-Matt
He took it in for emissions testing and it failed, by a lot. So, he put the Guaranteed to Pass stuff in it and it passed with FLYING COLOURS. Weird, but it works.
-Matt
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From: Sussex County, DE
Originally Posted by TexasGuy001
It might be a cheat, but from what it says it may just be a cleaner.
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