If you change the O2's, just replace the uppers as the do all the calibrations that count This is why I always check my MPG, just to see what its doing BTW, is your O/D working correctly? The reason I ask is because if its stuck in regular DRIVE, your mileage will suffer some, especially on the freeway.

Last edited by The Striped SVT; 12/29/03 03:47 PM.
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