TorG0d is your check engine light on at all? If it is, and it's caused by something amiss with your engine (e.g. a bad spark plug), your SVX's ECU will immediately go into a richer 'safe mode' - and when it does this, gas mileage is comprised somewhat.
My engine is currently in safe mode, due to a bad knock sensor that I'm replacing later this month. I was averaging about 20.5 mpg with city/highway driving before, now I'm getting about 19.5mpg average.
-Chike
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Originally posted by TorG0d
OK, ruling out driving habits, O2 sensors, catalytic converters collapsing, what else could cause a steady decline in gas milage? Could a broken VSS2 affect this at all?
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