NO= NiTRIC Oxide. Nitrous is Laughing Gas - Saab 900 Bulletin Board - Saabnet.com
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NO= NiTRIC Oxide. Nitrous is Laughing Gas
Posted by JD From LA (more from JD From LA) on Thu, 21 Jul 2005 23:02:08
In Reply to: NO= Nitrous Oxide- Usually bad Cat causes this, JeffR [Profile/Gallery]
, Thu, 21 Jul 2005 18:13:23
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Oxides of nitrogen are byproducts of complete combustion. The reason the decarbonization worked was because the excess carbon in the cylinders increased cylinder pressure and caused higher combustion temps, both necessary for NOX. Running a can of Techron though the motor will help decarbonize the chambers.
Also, try retarding the ignition a couple of degrees from the stock setting. Better yet, check the timing and you might find it advanced which would make a bigger difference in combustion pressure at the lower rpm test speed. If the timing is too far advanced, it will probably pass when set to the stock setting.
My '83 900T has to undergo testing at a test-only station and has always passed easily.
JD
posted by 24.205.44...
Posts in this Thread:
- 90 SPG Fails CA Smog Test - Thoughts?, Randy Thatcher , Thu, 21 Jul 2005 13:59:43
- Re: 90 SPG Fails CA Smog Test - Thoughts?, Rencey, Thu, 21 Jul 2005 22:50:05
- Re: 90 SPG Fails CA Smog Test - Thoughts?, morgan , Thu, 21 Jul 2005 20:19:52
- Re: 90 SPG Fails CA Smog Test - Thoughts?, Randy Thatcher , Thu, 21 Jul 2005 17:54:13
- I bet it passes too. I take mine to Arco..., Scott Paterson , Thu, 21 Jul 2005 17:40:12
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