Re: Failed emissions for NOx - Saab Performance Bulletin Board - Saabnet.com
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Re: Failed emissions for NOx
Posted by jerrit [Email] (more from jerrit) on Fri, 30 Jul 2010 13:10:55
In Reply to: Re: Failed emissions for NOx, lms, Fri, 30 Jul 2010 12:16:45
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Cleaning the maf and resetting the power are both good suggestions, I'll try those. I think I've seen spray cleaner labeled just for mafs at the parts store.
I know NOx indicates hot (usually lean), that's why my first guess was timing too advanced. The MAF is only around 19k miles old, so it's more likely dirty than broken (I hope). I have the old one as a spare, I only changed it as preventive maintenance back a few years ago. I think the vacuum hoses are on "right", but if changing them back makes a difference, then I'll know that's part of it.
It's a rolling dyno test, no fans.
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