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Q: Poor Gas Mileage on 2002 Chrysler Town & Country

I have a 2002 Chrysler Town and Country and an only getting 20 mpg on the highway. It passed smog with flying colors. I have also changed the spark plugs, air filter, ignition wires and cleaned the fuel injectors. Any other ideas?
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Gas mileage is a big concern for everyone now a days. Even though your Chrysler has passed smog and probably has no Service Engine Soon/Check Engine Light on I would still like to see the figures for short and long term fuel trim view on a scan tool hooked up to the 16 pin diagnostic socket under the dash. The scantool is set to the mode that reads live data. If the figures are near zero there isn't much to be done. If the figures are 10% or more then diagnostic tests can be done.
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