Re: '94 Aero with high NOx and somewhat reduced power - Saab 9000 Bulletin Board - Saabnet.com
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Re: '94 Aero with high NOx and somewhat reduced power
Posted by SteveJ (more from SteveJ) on Wed, 31 Oct 2007 08:55:40
In Reply to: Re: '94 Aero with high NOx and somewhat reduced power, Mike C, Wed, 31 Oct 2007 08:46:11
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A not so obvious leak may be the fuel vapour recovery system. My 96 was having an intermittent check engine light due to long term fuel trim/ lean mixture. I suspected the purge valve, so plugged the connection at the intake. Light had gone out before I did this, and has not come back on after a week or so, and 800 km. I made a guess that it was the valve since I used to hear a noise from that area (right front fender) shortly after driving on initial cold start, then there was no longer the noise.
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