Question about Hyundai 2007 Sonata GLS

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Very poor gas mileage.

My car is due for a tune up, but recently i am getting very poor gas mileage.

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A tune up should fix this problem.

Posted on Jan 14, 2013

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Posted on Jan 02, 2017

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If you suddenly are getting poor gas mileage your O2 (oxygen) sensor may have failed. The O2 sensor helps dictate how rich or lean the fuel mixture is. If it fails the engine's computer defaults to a rich mixture so not to burn a valve or run too hit. This can be checked and if need be easily replaced. And yes if the van is over-do for a routine tune-up this is always a good investment. Make sure to check the air filter too, if she's dirty the engine will starve for air and get poor mileage.

I hope this may have assited you,
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My car has poor acceleration and it shakes when stop also smells


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1 Answer

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