Re: gas/O2 ratio - Saab 900 Bulletin Board - Saabnet.com
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Re: gas/O2 ratio
Posted by Sjer (more from Sjer) on Mon, 11 Feb 2002 18:20:17
In Reply to: need help with failed inspection, marko, Mon, 11 Feb 2002 09:57:40
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NOx problems are caused by two things primarily- first, high O2 in exhaust gas and second overly high combustion temperature.
A poorly tuned engine or leaking exhaust valves can hurt you a lot with emissions, but they are also going to send hydrocarbon readings through the roof, and you don't mention HCs as a problem. So the most logical guess would be you are running high O2, probably because of O2 sensor, AMM, or vacuum leaks. The best bet is check for vacuum leaks, then replace the O2 sensor.
posted by 208.58.23...
Posts in this Thread:
- need help with failed inspection, marko, Mon, 11 Feb 2002 09:57:40
- Re: gas/O2 ratio, Sjer, Mon, 11 Feb 2002 18:20:17 <-- Viewing This Message
- Emissions, Bobby, Mon, 11 Feb 2002 15:53:18
- Re: need help with failed inspection, KevinD, Mon, 11 Feb 2002 13:24:04
- Re: need help with failed inspection, paulh, Mon, 11 Feb 2002 11:55:26
- Re: need help with failed inspection, Dick in Falls Church, Mon, 11 Feb 2002 10:27:42
- check these, Bill, Mon, 11 Feb 2002 10:16:00
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