poor gas mileage! HELP!

[KLgear]

need help with improving gas mileage! please!

something is seriously wrong with my 240. i don't exactly know, because the car seems to run fine; for some reason the car gets terrible gas, i mean terrible "18 miles per gallon" :bash: . i don't know what is wrong with the car. the only modification to the engine, or related to the engine, is a lightweight flywheel, racing clutch, grounding kit, and some new ngk spark plugs and wires. also recently replaced a crank case positioning sensor. in case you are wonder what year is it, it's a 95 se. oh i also used seafoam for the crank case, and the gas tank. The car is getting worst......... pleaaaaaaaasssssssssssssssssssseeeeeeeee! help!:confused:

[nistech]

o2 senser might be messing up does ur mil go on at all.

[Ian]

18 MPG isnt bad...do you drive hard alot? you shouldnt expect better mileage then that unless you actually drive slow like normal people

[Dutchmalmiss]

air filter still good? o2 sensor still good? i don't know what else, exhaust and gaskets?

[KLgear]

i guess i could change the aif filter and maybe check and see if i need a new o2 sensor; because the engine does have 130k miles on it and i'm not sure if the previous owner bought a new one or not. the strange thing is, right when i purchased the car (about 6 mouths ago), it was getting pretty good gas mileage. maybe around 25 miles per gallon.

[publicenemy137]

air filter, fuel filter are what I'd look at. I get around 24 miles per gallon right now

[sub9lulu]

dude my mess up rx-7 has 18 MPG, my friend's 240 use to get like 30MPG

[twitchy]

unplug your O2 sensor till you have it changed

single biggest thing on my car

[8kred]

i get shitty MPG too after i changed and tune up everything there is to do. 30 mpg would be very nice......

[w1ngzer0]

run some head cleaner next oil change,o2 sensor, temp sensor,fuel filter,alignment,air filter. Thats all i can think of

[twitchy]

head cleaner?? describe??

also throttle body cleaner in the throttle body and vacum lines helps

[91CRXsiR]

my old FC3S NA got like 15 mpg I get about 20 right now, but I just changed oil/fuel filters so Im hoping for better numbers.. but it doesnt really matter that much if we wanted fuel econ we would have gotten a civic hx or something

[Tweaker]

I say just do all of the above one step at a time till ya solve the problem.

[w1ngzer0]

head cleaner?? describe??

also throttle body cleaner in the throttle body and vacum lines helps

stuff you can buy at any automotive store. Just look in the oil isle and you will see it :)

[mistaanime]

heh 30 would be nice..i think i only get like 24..heh