Lack of power, poor starting, hesitation on acceleration going up a hill, and rough idle at stops are all indicators of a plugged fuel filter. At Sherwood Exhaust we have the diagnostic equipment to inspect your fuel pressure. A fuel filter is generally replaced as part of a regular tune up. Contaminants can get into the fuel i.e. bad gas and the contaminants that deposit in the bottom part of the fuel tank cause inadequate fuel pressure causing engine to run lean. This has the potential to to damage internal parts of the engine.