i have a 92 civic ex sedan that bought and i did the tune up and everything, but i have a problem with gas milage, i filled my car up last thursday and didnt go anywhere till sunday where i went to my grandma house which is 25 miles from where i live and came back and my car was sitting almost empty, so i bought a new fuel filter and put it on but is still wasting a lot gas, can someone please tell me what could be wrong?

 

someone's siphoning off your gas.

No, but for real, do you smell gas at all, b/c my first guess would be a gas leak. Have you noticed any puddles or oily residue? I don't know of a mechanical problem that would cause you to burn 10 gallons of gas over a 75-100 mile range, unless you have 4 more cylinders hidden somewhere.

 

im thinking you have a leak. same thing happened with my EA hatch, i didnt notice until i was at the gas station filling up..

 

def have a leak somewhere

 

a bad map sensor can also be a direct cause for terrible mileage. I was clocking less than 100 to a full tank when mine was bad. Car ran disgustingly rich.

Also look to the primary 02 sensor, thats a large factor in gas milage as well.

 

I got 8mpg's once, had a crack in the vac hose to the fpr diaphram on the fuel rail.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by z6hatchboy &raquo;</TD></TR><TR><TD CLASS="quote">I got 8mpg's once, had a crack in the vac hose to the fpr diaphram on the fuel rail.</TD></TR></TABLE>

score! Must have been leaving a trail down the road as you drove.

 

A bad map sensor would throw a code.

Did you touch the distributor at all? If you mess with the timing, it will increase gas mileage.

But from the sounds of it, 25miles and it's almost empty. More then likely a leak.

Check to make sure you tightened the new fuel filter up, also, run the car and sniff anyway. It's either a bad line or the tank itself.

Best of luck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DominikEG6 &raquo;</TD></TR><TR><TD CLASS="quote">A bad map sensor would throw a code. .</TD></TR></TABLE>

A going-bad one would not though.