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Discussion Starter · #1 ·
Anybody know how the instantaneous and avg. mpg are determined? Does it have anything to do w/ the TPS? This is on a '98 V70 XC. I'm asking this, because I just changed mine (that's what the CEL code said it was), and my mileage has dropped by 1.5 - 2 mpg, as indicated by the computer.
 
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