Q: Poor fuel mileage

asked by on July 21, 2017

When my car is cold it drives fine until it warms up. Its very sluggish when it warms and i can have the pedal all the way to the floor and my rpm meter isnt moving and im only doing 40. Once i put car in neutral and shut it off and turn it back on it will go up to 60mph. This car will not go no faster than 65mph and the pedal will be all the way down and the rpm guage will be at 2900 and staying there. Also i have real bad gas mileage i could have full tank and go a total of 15 miles and and ill be on a half of tank. What could be causing this??

My car has 132786 miles.
My car has an automatic transmission.

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