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#1
03-15-2008, 08:34 PM
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Passing emissions....
My uncle has a '96 Subaru that failed. I told him to get a new O2 sensor and maybe change the egr valve. I heard someone here say they dumped something in the tank to pass.
??
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'85 300SD (formerly california emissions) '08 Chevy Tahoe '93 Ducati 900 SS '79 Kawasaki KZ 650 '86 Kawasaki KX 250 '88 Kawasaki KDX200 '71 Hodaka Ace 100 '72 Triumph T100R 
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#2
03-15-2008, 08:49 PM
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I think it all depends on why it failed. Did he get a written report on the various parameters and which ones it failed?
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#3
03-15-2008, 08:51 PM
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It depends. What did it fail on? High HC could very well be oxygen sensors, since they have a finite life. Usually after about 60,000 miles they are ready for replacement. They don't fail all of a sudden, but gradually read leaner than the actual value. This causes the computer to put in more fuel resulting in higher HC and worse fuel economy. They can get pretty bad before they set off the CEL.
OTOH, NOx is usually from a fault in the EGR system. CO is often cats but can be other things too.
__________________
Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar. 83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 400,xxx miles 08 Suzuki GSX-R600 M4 Slip-on 22,xxx miles 88 Jaguar XJS V12 94,xxx miles. Work in progress.
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#4
03-16-2008, 01:10 AM
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Is he in PA too? You should be able to get the specifics of what failed. Also, was it a computer test (reading the car's onboard diagnostics) or a tailpipe test? (not sure what PA does)
There are ways to tweak the results, but you really have to know what you're trying to tweak... and it's usually just as cheap to fix the actual problem than to rig the test. (and ethically sound)
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Cannondale ST600 XL Redline Monocog 29er 2011 Mini Cooper Clubman 2005 Honda Element EX www.djugurba.com www.waldenwellness.com
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#5
03-16-2008, 01:16 AM
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It won't make up for a bad part, but the stuff your looking for is called "guaranteed to pass". just pour it in the tank and burn up that whole tankful, refuel and go get your test again!
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#6
03-16-2008, 06:43 AM
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I'll ask him for specifics, but all he said in the email is they told him he needs a new catalytic converter and an O2 sensor.
__________________
'85 300SD (formerly california emissions) '08 Chevy Tahoe '93 Ducati 900 SS '79 Kawasaki KZ 650 '86 Kawasaki KX 250 '88 Kawasaki KDX200 '71 Hodaka Ace 100 '72 Triumph T100R
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#7
03-16-2008, 06:54 AM
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I have heard that putting a spark plug anti-fouler on the O2 sensor will cause it to read cleaner. I do not know the specifics.
__________________
1982 300SD " Wotan" ..On the road as of Jan 8, 2007 with Historic Tags 
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