Question about 1997 Plymouth Neon

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I get 35 mpg on the freeway. The next day I will get 16 mpg just driving it around town. I have tuned it up and it runs great. No gas smell or leak. Could it be bad injectors, fuel pump or maybe needs a fuel filter? Can a real bad air filter cause this problem?

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  • Brent Quicksword Jan 30, 2009

    You hit it on the head. I just bought this car and the front panel on the air filter box is missing. The filter is open to the elements and I can see that it is super dirty. Would not have thunk that an air filter would cause this prob. Thanks Volvo2103

  • Brent Quicksword Jan 30, 2009

    I did think of replacing the fuel filter,,have manual but this one is on top of the fuel pump which is on the gas tank,,,hard to get at by the looks of it,,unlike pre 1997. Thanks.


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A very simple and inexpensive solution to this dilemma is to replace the fuel filter. Sometimes they get particles in the fuel system that get caught up in the filter, and plug it up. They are generally inexpensive, and the change takes less than half an hour. If you are mechanically inclined, you can even do it yourself. Buy a Haynes manual specific to your car, and you can learn to do the simple things yourself, saving a ton of money! It is worth the effort.

Posted on Jan 30, 2009

  • gssttmr Jan 30, 2009

    Sorry I couldn't be of more help. It was a solution that worked on my car(a 1994 Explorer). I understand not wanting to mess with anything on the tank, that can get very complicated. I will ask some of my mechanic friends, and if I find a better solution, I will get back to you. I know that car problems can be frustrating.


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A really dirty air filter will knock down your gas mileage greatly....yes. Also keep in mind that you don't get as good of mileage around town, as you do on the freeway.....35 mpg isn't too shabby....oh and please give me a rating....thank you

Posted on Jan 30, 2009

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