Is It Time For a Tune-up Yet ? Power Loss and Poor Gas Mileage
How long since the fuel filter was changed? A dirty filter is a common cause of power loss. As noted under "poor gas mileage", there can be many causes of this condition, most of which can be located with a diagnostic procedure.
Poor Gas Mileage
By keeping a regular check of gas mileage (miles driven divided by gallons used) you can tell if your engine is losing efficiency. Increased gas consumption may be accompanied by other symptoms listed in this website.
Poor gas mileage also may be due to: