lost 100 miles 2 the tank

94civicoupe · Post by **94civicoupe** » Fri Feb 22, 2008 1:08 am

So i use to get 400 miles to the tank on a 94 civic coupe, but now i get about 300 going down to the end, I changed the fuel filter, and cleaned out the pcv valve, and it had a recent tune up as well, what should i check next? One other thing i've been thinking is timing might be off, but the car doesn't have any cel and doesn't run bad, so any suggestions????

Waffles · Post by **Waffles** » Fri Feb 22, 2008 1:45 am

Plugs, wires, cap, coil, rotor, o2, air filter?

big pipe · Post by **big pipe** » Fri Feb 22, 2008 1:49 am

its the cold weather, everytime you start your car its dumping in hella fuel until it warms up to operating temperature, aka choke mode. i bet once spring comes around your good gas mileage will to.
in the summer my truck gets about 18mpg, during the winter i get around 13mpg.
also make sure your tires arent underinflated, the cold air will make them drop a few psi.

Potts1 · Post by **Potts1** » Fri Feb 22, 2008 3:14 am

are you letting it warm up a bit before you drive anywhere after letting it sit over night? that will usually do it

big pipe · Post by **big pipe** » Fri Feb 22, 2008 7:57 am

hate to say it but replacing the fuel filter will cut a little mileage from you.... more gas in the engine=less in the tank

94civicoupe · Post by **94civicoupe** » Fri Feb 22, 2008 6:35 pm

ya i let it warm up, it takes forever to warm up as well, the one thing i havn't changed is the distributor, but ya that seems right about winter time, cause it did start when the cold weather hit.

2nrsOfSpringfield · Post by **2nrsOfSpringfield** » Sun Feb 24, 2008 5:34 pm

sounds like a bad O2 to me

94civicoupe · Post by **94civicoupe** » Mon Feb 25, 2008 2:07 pm

wouldn't that throw up codes?

2nrsOfSpringfield · Post by **2nrsOfSpringfield** » Mon Feb 25, 2008 5:28 pm

not always, sometimes they just get slow or lazy and not work right but still work enough not to through a code.

94civicoupe · Post by **94civicoupe** » Tue Feb 26, 2008 2:41 am

aight thanks, one more thing on a 94 civic coupe, i just got one that I know of, there arn't anymore 02 sensor are there?