Hey guys im a little worried. I have a 94 civic EX and i was hoping i would be getting at least over 20 mpg city driving but i have filled it up two times in the last week with a whopping twenty dollars and its only getting like 14mpg!!! Its got a short ram intake which should be HELPING the fuel mileage! I just replaced the filter on it AND the fuel filter!! I dont drive like a maniac (although i love driving a little harsh) but even so it should not be THAT LOW! i do drive on the highway a bit(80% city 20% highway). What could be causing my problem?? thank you

ps: i just made sure the tires have the right amount of pressure and they do. 32 on all four, stock recommends 28 but i dont wanna f up my rims so a little extra cushion =)

 

Try checking to see if all of your spark plugs are firing. See if your air filter is clean. If your oil needs to be changed soon I'd say try sea foaming it like what's explained https://www.hondacivicforum.com/forum/showthread.php?t=14612 It will clean out your engine and fuel system and might help. Make sure you drain and replace the oil within a 100 miles of using it though. See if your timing belt is correct.

All that I could think of off the top of my head.

 

Check the spark timing, that will also detect improper cam timing. Is the CEL on? (Does the CEL work?). Unplug the fuel injectors one at a time while the engine idles to check for dead cylinders. How is the highway mileage? City driving conditions vary so much it is hard to say what a "good" city mpg would be.

 

"32 on all four, stock recommends 28 but i dont wanna f up my rims so a little extra cushion =)"

What kind of rims and tires?

 

They are some falken 17 inch rims and the tires are ecsta 205/40/17r

 

The spark plugs are all good, ill try sea foaming and ill check the timing belt, thanks

 

The CEL does work it does not light up though, everythings in perfect shape that is why i am so surprised! Ill check the fuel injectors though and the spark timing, i havent been on the highway since my last fill up so i cant say, thank you