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wtberni 12/5/2012
2009 Hyundai Accent GL 4 Cyl 1.6L - Engine
MPG has dropped from 32 MPG to about 30 MPG. Why???
I bought the vehicle about 7 months ago with 20,000 miles on it and consistently got 32 MPG and now it has dropped to about 29-30 MPG, only thing I have done is change the oil; tires are new and in good shape. What could caus ethe drop, air filter? Or something else?
1 Answer
  • Jimm
    Jimm 12/6/2012
    Here are some simple suggestions;
    Check your fuel system, dirts creates poor combustion - means some of the mixture were not burned during combustion.

    Dirt inside fuel tank - clean it w/ fuel cleaner

    Clogged fuel lines - clean the lines

    Clogged fuel filter - replace filter

    Clogged fuel injectors - clean fuel injectors

    Dirty air filter - replace air filter

    Low tire pressure - check and fill to the recommended pressure

    Have the on-board diagnostic (OBD) system checked (scanned) for free - at any local auto parts store. Retrieve any stored codes that maybe not displayed.

    Post a reply with these above possibilities and any specific fault code(s) - for further assistance.

    Visit these parts sources; or for parts as required.

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