> What would cause a car, that was recently given new spark plugs and wires and the mpg rose about 4 mpg, to suddenly decr

What would cause a car, that was recently given new spark plugs and wires and the mpg rose about 4 mpg, to suddenly decr

What would cause a car, that was recently given new spark plugs and wires and the mpg rose about 4 mpg, to suddenly decr

Posted at： 2015-01-07　
No car loses 10mph and still runs OK. Check your MPG calculation again.

change in a sensor value. loose connection? have a scan run for fault codes. this will point to best area of concern. a dealer ought to be able to best pinpoint a reason..

when did you last change your fuel this is one thing to look at change it any way good luck

it has been possessed by satan
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