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Discussion Starter #1
please help me find out why mi car is only giving me 17 mpg where it should be 27 mpg. it' got a 4.3 engine and more important how can I fix the problem.
 
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17mpg sounds about right for that car. If you want to increase it, you should inflate the tires to 35psi, clean the air filter, and get new spark plugs and wires. I would also check the catalytic converter. If it is starting to get clogged, replacing it or removing it will increase mileage as well.
 
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how many miles on the car? is it mainly used in town or highway? more than likely a tune up is in order. spark plugs, wires, cap, rotor, new fuel filter, etc.
 
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