It's the air pump - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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It's the air pump
Posted by John (more from John) on Mon, 26 Feb 2001 09:13:27
In Reply to: engine whirring after shut off -- OK?, Joe Sullivan, Sat, 24 Feb 2001 16:36:24
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The NG 900's (mine's a 2.3 NA) have an air pump that pumps air...it's like the old A.I.R. (stands for air injection reaction) pumps that many cars use - it's purpose is to introduce excess air into the exhaust stream, so that the catalytic converter can do it's job. When the O2 sensor says it's low on oxygen the pump kicks in - it's behind the left headlight assembly - tough to get to unless you get underneath the car - you can see some of the plumbing if you get a light and look under the battery.
THe noise is no problem... if it quits working, the check engine light will talk to you!
Posts in this Thread:
- engine whirring after shut off -- OK?, Joe Sullivan, Sat, 24 Feb 2001 16:36:24
- Yes - it's electric, John, Mon, 26 Feb 2001 16:52:10
- It's the air pump, John, Mon, 26 Feb 2001 09:13:27 <-- Viewing This Message
- Re: engine whirring after shut off -- OK?, clayton, Sun, 25 Feb 2001 21:09:00
- Re: engine whirring after shut off -- OK?, xq, Sat, 24 Feb 2001 16:57:04
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