Join Date: Apr 2007
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That 2mpg hit is a worst case scenario, usually quoted by folks comparing the figures with the optimistic factory numbers of a stock vehicle when new.
In any case, once you average out the days that the EFI gives you 6mpg because of faulty sensor readings or plugged IAC, you will most likely save on gas in the long run.
"Your only supposed to blow the BLOODY DOORS OFF" Charlie Croaker. The Italian Job. 1969.