Question about 2002 Honda Accord

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Same my 02 accord gets 20 mpg and nobody can figure out what is wrong.

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Try cleaning your air filter and running some fuel system cleaner through it to to clean the carb.also check the O2 sensor. Things to check/try in order to improve fuel mileage on almost any vehicle:1) Tire Pressures. Are tire pressures no lower than manufacturer recommendation? Remember to check tire pressure in the morning (when cold), and that a 10 degree (Farenheit) drop in outside air temperature will decrease tire pressure by about 1 psi. Also, some tires, especially older ones, may "leak" up to 1 psi per month. If pressures are too low, try to visit a station near home, and put in 3 or 4 more psi than you want - after a few hours or next morning, check pressures and bleed any extra pressure. Why: tires may read 3 or 4 psi higher after a few miles' use vs when cold.
2) Alignment. May need alignment. Can't really tell without putting it on an alignment rack, unless it's pretty bad, in which case you may see uneven wear (especially on front tires).
3) Brakes. One or more brakes may be sticking (especially front). I've had this happen on BOTH our vehicles.
4) Bearings. One or more wheel bearings may be binding/failing (unlikely, but possible).
5) Oil. Are you using 5W30 oil in cold weather and 5W30 or 10W30 in hot weather? Changing oil AND FILTER regularly (at least as often as manual says)?
5) Vacuum hoses. Check that all vacuum hoses are secured and intact.
6) PCV. Replace PCV valve (as you face engine from front, it's way in the back left corner, almost as far as you can reach; narrow space so it's a bit tedious to change, but no tools required - about $5).
7) Wires. Are ignition wires in good shape (ie, no cracks, etc.)?
8) Other. One or more engine accessories (alternator, power steering pump, air conditioner, water pump, etc.) may be binding (unlikely but possible).
9) Heating and Air conditioning will have a lot on fuel consumptions in addition to driving habits, city driving or highway driving. A big difference in fuel consumptions when driving 60mph (~100kmph) and 80mph (~130kmph) on highways.

Posted on Jul 25, 2009

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