hi all, any of you guys experience terrible gas mileage? i am getting 16-19 around town, and not too much better on the highway. i had it looked at and the guy leaned it up a bit and turned the timing down 2 degrees. after this the car felt overly sluggish so he changed the timing back and made it a bit richer (but not back entirely to how rich it was). It seemed to suddenly get bad when it got real cold. He also said my O2 sensor wasn't working properly at idle but seemed to fine at 2-3k rpm's or better. i think this has something to do with it, especially in stop and go situations, but even when cruising on the highway the mileage is bad. any suggestions much appreciated. thanks
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