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I think emission testing is a scam - high NOX Posted by DougM [Email]  (#211)  [Profile/Gallery]
(more from DougM) on Mon, 22 Nov 2010 14:58:07
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1988 900T convertible.
This is my fourth emission test with this car, which has to be done every two years.
The first test had to be done when I purchased the car, which was around 2005, then was tested again for plates in 2006. I don't recall what the numbers were, but it passed all categories those times.
The 2008 test failed because of high NOX - 1600ppm with an allowable of 1268ppm. I drove home and read a few posts on this BB, and the only thing I did was move the timing a few degrees, but I don't recall which way I moved it - advanced or retarded. Three days later it passed with a reading of 860ppm NOX.
That failure has always bugged me, and I've been putting off the testing this year because I always have a fear it will fail again. So procrastinating me waits until a few days before my birthday to take it in. I stopped in after work, and they refused to dyno it because they noticed a sizeable puddle of coolant underneath. The darn overflow tank appeared to have a cracked neck, so I drove home and swapped it with a used one, then drove back to await more failure. They only did a "quick" test this year(but I remember them running it longer the other times it was tested), and it passed with flying colors - 206ppm NOX. I will admit this car has been neglected the past few years, and it's only been getting oil changes and tanks of gas, but I never would have imagined the emissions are actually getting better the older it gets.....next time should be no test since it might qualify for the 25 year exemption.
posted by 76.189.12...
, Mon, 22 Nov 2010 14:58:07 <-- Viewing This Message
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