Re: O2 / LAMBDA question (bonus ? - horn) - Saab Saab Model 99 Bulletin Board - Saabnet.com
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Re: O2 / LAMBDA question (bonus ? - horn)
Posted by Don Wollum [Email] (more from Don Wollum) on Sat, 3 Mar 2012 08:17:30
In Reply to: O2 / LAMBDA question (bonus ? - horn), SalemSaab, Fri, 2 Mar 2012 09:58:32
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Verify if the fuel pressure frequency valve is just outboard of the large end of the air bellows. This and a ECU under the drivers seat, a Cat in the exhaust and and of course a O2 wire female end near the battery. These will all confirm ( along with the emissions decal) What emission certification you have, Lambdia is a fine system and should be working.
The relay must be plugged in for the fuel pressure frequency valve to work ( buzzing at a frequency any time the engine is on). If it is quiet then the Lambda relay should be reinserted. Big Catch 22 here. When the relay was pulled, a HUGE mixture variation was created and to drive anywhere near normal, the 3mmm mixture key was turned alot. SO restoring the Lambada MAY carry the immediate need to adjust the mixture again. If cat equipped, set co warm at 875 RPM to 1.5% (after cat and O2 disconnected ) OR have (borrow) Saab frequency meter and set Pulse ration to swing between 35-45% when warm at 875 rpm WITH O2 connected.
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