WHen I first bought my civic cx about 2 years ago, I bought it in portland and drove it home to montana and got about 45mpg, now I am currently only getting about 30mpg all highway driving and worse city driving. I do have slightly larger tires on than stock and they are 195/55/15. I have also lowered my car slightly. Anyways I was wondering if you guys could give me any info on things to check, ect. and help me find out why I'm getting such bad gas milage.
Also, did you buy it new (what year is it), is it automatic, and how long has it been since the fuel system was cleaned? Also, any check engine lights, bad 0xygen Sensors, etc. Tell us everything that's changed since you got it. I doubt the tires would pull the mileage down that much, tho
sorry for leaving out some info.
Its a manuel 92 civic cx. Bought it with 80,000 miles on it, now it has 113,000. I've changed the spark plugs, axles, transmission fluid, dizzy, cap, rotor, oil every 3,000 miles and timming belt, I've put on new 15" rims, they are actually lighter than the stocks steelies though, and new tires for the rims.
no check engine lights, or gassy smells, doesn't burn any oil, it might be a little more sluggish than when I first bought it.
I understand the money predicament, of course. Run a wire from the 1 wire on the o2 sensor and hook it up to a DMM, when you're driving it should read about .5 volts, if not the sensor is messed up most likely or the engine is pooped. I have a spare o2 sensor to send you if you need it. Cat you can just take off and look inside of and see if it looks clogged up.