projectpd

Hey i got a 97 civic Ex (d16y7) canadian ! im only getting about 380km per tank and i heard some other people saying they could get easily around 500! and i travel everyday about 75km to go to school so its pretty much highway ! I got a cold air intake and a cat back 2.25 exhaust ! nuttin special ! i did a tune up everything except a fuel filter ? did anyone hear of a fuel filter affecting gas mileage ? help needed thanks alot !

Pierre

Diet coke boii

fuel filter

projectpd

you guys sure something like this would decrease fuel milleage ?
i got 210 000 km on it tho

NHB

It's a relatively cheap part and easy to install. Considering your mileage I'd start there. When was the last time you cleaned the filter on that cold air intake?

Diet coke boii

Yes the fuel filter will deff decrease fuel mileage.

projectpd

its a bit old but like its a ractive cone ... can i use the K&N cleaner for it ? how would i clean it then ?

projectpd

any ideals ?

projectpd

completed the tune up about a week ago ... fuel filter was changed ! since then burnt 2 tanks of gas and no visible effect ... so i chaged back to stock air filter ! no change !!! im getting sick of this crap !!! mayb my o2's ?

greengiant

I was getting the same amount of mileage as you were. Recently did a tune up since I had to replace fuel pump because it crapped out on me.

Other then the Fuel pump this is what I replaced.
fuel filter
spark plugs
ignition wires (not necessary but they crapped out on me as well)
cap & rotor (also adjusted my timing and it was set to +3degrees. changed it to +1degree)
air filter

After all this, I can now do about 440km and I drive through rush hour traffic 5 days a week. This past easter weekend I was driving all over southern ontario to visit family and I got about 520km on the tank

projectpd

so your saying maybe my fuel pump is going ?

greengiant

No no.

I'm just saying that when I replaced my fuel pump I went ahead and did a full tune up and those were the things that I did and they helped my fuel mileage. My fuel pump actually just died on me before I did the full tune up.

I suggest start with the spark plugs, cap & rotor, air filter, & fuel filter. Check your timing too because it can help. Bad o2 sensors can cause bad fuel mileage but I'd replace those last because OEM o2 sensors dig holes in pockets and I'm not a fan of aftermarket replacement ones.

Padawan

Are you driving aggressively? Driving style can greatly influence fuel economy.

YoungKadafi

alot of other things could affect it, if you have any modifications to the outside of the car like spoiler, your suspension could degrade your MPG, and your o2 could be doing this aswell.

wrEcKed_LX

iTrader: (1)

Driving style is one of the biggest influences on MPG.. I used to get 17-20 driving like an *******. Now I drive like a normal person and get 30-34+. Not sure if my fuel filter has ever been replaced as well.

projectpd

hey thanks for all the replys ! i was driving like i stole it a whyle ago then i took it easy on it and out of nowere it started to be bad on gas ! well a full tune up has been made on it but havent had the chance to check my timing belt ! i know i need to change it i might do a little work on it then ! well if anyone has an ideal how to check your 02's let me know thanks !

ke98248

iTrader: (1)

bad 02 sensor=check engine light on

YoungKadafi

^^^not always, a slow 02 could put out really bad gas, and get an incorrect reading