I own a AT 2002 Accent and in the last few months my mileage deteriorated considerably, I'm getting between 19 and 20 mpg, a full tank will go for about 200 miles. I used to get a lot more, around 25 to 28 mpg.

I remember that a while ago I read that some sensors on certaing Hyundai AT models had issues and caused the the gas consumption to spike up, and that disconnecting (not replacing) said sensor would improve fuel economy somewhat. Is this true? In case it is could someone point me to where I can get instructions on how to disconnect it?

Thanks,

James

Never heard this one before about removing a sensor but i would hazard a guess at the Oxygen sensor located in the exhaust manifold.

Could your driving have changed recently?
Tire pressure all up to normal?
heavy loads, cold starts, short journeys, heavy accelaration lately?

Just ruling out some options here..

This vehicle is available in multiple versions that look the same, but may have different air pollution scores.


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jones

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guess what..I think they just started introducing the "winter mix" back into the tanks and using E-10 because my gas station now says 10% ethanol and her mileage went from 32mg to 20.7 mpg....i just filled it up at a 5% ethanol station last week and it went back up to 31.2 when i filled it up today.

my lincoln also lost about 5mpg from the same station where my wifes car lost it also.

bought a 2001 accent GS with 90K. Got 30MPG.
Replaced timing belt - mileage went to 33
Had front end alignment - steering improved dramitically and mileage went to 37!!
And that's in combined city/highway. Have yet to try an extended trip!!