Re: rough ridin' - Saab 9000 Bulletin Board - Saabnet.com
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Re: rough ridin'
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Posted by Michael Schwab [Email] (more from Michael Schwab) on Fri, 8 Dec 2000 09:44:42 Share Post by Email
In Reply to: rough ridin', bg, Thu, 7 Dec 2000 21:02:55
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If none of that works, try cleaning the Mass AirFlow Sensor. Its the Coke can sized sensor with the electrical connection in line with your air intake. I removed the screen grates and used carburator cleaner on it. Then I wrapped a rag around the end of a screwdriver and GENTLY cleaned around the sensor. CAUTION !! Be extremely careful not to touch the tiny wires inside the round sensor area in the middle. They are thinner than hair and nearly impossible to repair if broken. Just spray this area, don't use the screwdriver in there as it will break the wires sure as shootin. I employed this procedure when my 1988 Saab 9000 turbo was running rough at low RPM with great results. Obviously though, the vacume leak is the first thing to look for. Get a vacume pump from Auto Zone or another auto parts place. Pull each vacume hose and attach it to the pump. They should all HOLD A VACUME. If any lines don't, you've identified a sure vacume leak. Now test just past each tee until you get to a component. If the component dosn't hold, that's the one!

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