Re: 86 SPG suddenly running very rich... help! - Saab 900 Bulletin Board - Saabnet.com
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Re: 86 SPG suddenly running very rich... help!
Posted by Ian Whelan (more from Ian Whelan) on Tue, 10 Jan 2006 18:21:00
In Reply to: Re: 86 SPG suddenly running very rich... help!, s.martin, Tue, 10 Jan 2006 09:51:19
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I am not sure if it's the O2 or the AMM at this point. My father is sending me a test AMM unit in the mail so hopefully it will do some good. The problem is that I'm not sure if the AMM went bad, if it would also kill the 02 sensor because of the very rich condition. I am sure that o2 sensors don't like being coated in unburned fuel.
I didn't test the o2 sensor with my multimeter since my A/F gauge essentially shows a graphical representation of the voltage. When it's running lean, it goes to red, stoich is yellow and rich is green. It's the autometer gauge so it has a pretty wide range of LED's to light for varying conditions, although I know it's not super accurate, it does something.
I pulled a vacuum line and the o2 sensor voltage was still cycling like normal, it would go to lean and then stoich repeatedly, just as it would do before the vacuum leak.
Does that tell you anything?
-Ian
posted by 69.116.93...
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