97 Highline horrible mileage

[Woogot]

I'm only getting like 9 or less mpg..
Only additional things on car to my knowledge is performance headers and aftermarket dual exhaust..

I need serious help >_>

[das2123]

When is the last time you had a tuneup? Spark plugs, spark plug wires, fuel filter, air filter, PCV valve and so on. Might want to start there.

[mikeburrit01]

one thing that really, REALLY put a damper on my mileage was my brakes. it seemed that they all sort of went at about the same time. one of my rear drums were stuck a little on. just enough that i didnt hear anything, I only noticed because the smoke from the brake fluid. it couldnt hurt just to check it out. like i said, i didnt notice till i saw the smoke.

[Johnobub]

I had some non-stock size tires on my neon and was getting poor mileage. I went back to the stock size tires and my gas mileage improved quite a bit more than when I had the wider tires. Also, I keep the tires inflated to 35lbs and check them almost daily with a good tire gauge.

[Woogot]

Originally Posted by das2123

When is the last time you had a tuneup? Spark plugs, spark plug wires, fuel filter, air filter, PCV valve and so on. Might want to start there.

Fuel filters aren't servicable on neons, can't find.

[das2123]

It's in the tank. Gotta drop it.

[jpb53]

IIRC the pressure regulator is a combo filter/pressure regulator.

[jeremyjjj]

I had a bad upstream O2 sensor do that i was getting about 12mpg...