Question about 2003 Honda Civic

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No power up hills

Car runs fine most of the time but going up hills it loses power and downshifting doesn't help. Lucky to be doing 40mph at the top of a hill. Hooked up a scanner and there wasn't any error codes and the emmision read fine. Fuel pump? Exhaust restriction? Mass air flow sensor?

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If you had a bad mass air sensor, it should register a fault code. Ditto for oxygen sensors. I'd change the fuel filter for sure, as well as spark plugs (make sure they're gapped correctly), and run a bottle of Seafoam through the gas tank. If that doesn't do it, change your cap, rotor, and spark wires (all told you're under $100 for everything).

Posted on Jul 21, 2008

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