Sudden drop in gas mileage + more...(long) - Saab 9000 Bulletin Board - Saabnet.com
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Sudden drop in gas mileage + more...(long)
Posted by 92saaber (more from 92saaber) on Wed, 26 Dec 2007 22:18:16
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Over the last couple of weeks I have experienced an unusual drop in gas mileage with driving habits remaining the same. About 75% of my driving is highway with average speeds of 70-75mph. I normally average 24-25mpg per tankful but I have been getting 19-21mpg range. Plugs were regapped to 0.9mm from about 1.3mm. Nothing. Changed di with a known good one. Same. The 92 9000S is pushing my patience (it wouldn't be the first time).
Just like it hasn't done enough, it seems to have a dislike for wet weather. Snow is fine. It will run so rough and stall when there is prolonged rainfall. This will happen for the first few miles after starting. Why?
In addittion, it has a 4 flash CEL that I understand means the coolant temperature sensor. Would that make it have a misfire? You can hear it especially on idle irrespective of weather. I have another sensor, but how on earth do you change it without kneeling and hoping for divine intervention, and sacrificing your first-born son?
92 9000S 217K miles and loving it!!!!
posted by 71.162.6...
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