My dad bought the car which had been sitting for about 9 months. Took it for a test drive and there was no problem. The after driving it for about 100 miles it started to cut out like crazy and the gas millage took a huge hit. It started getting about 20 when I know it should get around 30. So I was wondering what is the most likely problem with it.
My car has 180000 miles.
My car has a manual transmission.
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