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Discussion Starter · #1 ·
I have a KIA 2008 Optima 2.4L that is getting bad fuel mileage, 24 MPG, when it should be around 28 MPG. The car has 183,000 miles. I have changed MAF, O2 sensors, fuel pump and filter. My data stream tells me 99% fuel intake, when it should be around 50%, or less. Could this be an injector issue? Yes, air filter new, and all clean. I Think Injectors, or Coils? Any suggestions? No codes.

Can I send Datastream info to anyone for assessment?

Thank you.

Ed
 

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2011 Kia Optima
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Did you just notice a drop in mileage? I had an '08 that the daughter now has with 300k miles and normally maybe 28 mpg, but I live in the country with a great amount of highway driving.
 

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Discussion Starter · #3 ·
Did you just notice a drop in mileage? I had an '08 that the daughter now has with 300k miles and normally maybe 28 mpg, but I live in the country with a great amount of highway driving.
It happen a few weeks ago.

Hoping an advance mechanic will chime in and I can send him the data stream information.

28 MPG is normal, but 23 MPG is not right. The computer tells its delivering 99-100% fuel.
 
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