Dean: Update - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Dean: Update
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Posted by TheKillerPenguin (more from TheKillerPenguin) on Sun, 7 Nov 2004 01:12:57 Share Post by Email
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Hey Dean, thanks for the help with my idling

After I techroned and changed plugs my car idles much much smoother, no stalling whatsoever. My mileage is kind of wierd though, and I'm wondering if you can help me figure that out. Right after I changed the plugs and techroned, my MPG went up to an avg. of 33mpg. This lasted for a 70 mile one way trip. However, later that day I returned back here, and over the course of the trip my MPG dropped to 28mpg. Since then I've been monitering it, sometimes it'll be around 27mpg avg and other times it'll be around 30mpg, and can vary during the course of the day. It seems like the most drastic changes in MPG happen after the engine is shut off and then turned on again at another time, as opposed varying over the course of one drive where the engine never turns off. Just so you know, all these measurements were taken at the same speed on the highway, with cruise control on. I am confused, and you are the guru around here. Help?

~KP

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