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Old 03-07-2010, 09:35 PM   #10 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Metro
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90 day: 67.07 mpg (US)

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I'd be suspicious of a vacuum leak. I had one on my car and it had symptoms like you describe: ran poorly when warm, reduced power, and ate fuel at about a rate of 20 mpg (US).

It did not set off the check engine light.
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