chevyboy07

i got this 95 2 door about 3 months ago,and no matter what i've done it wont go past the 25 mpg mark on all freeway. city it only does about 20. whats the deal?1 i've changed the plugs,regaped them,changed the oil, oil filter and air filter. out of ideas and looking to get around 25 and 30

ezone

Brakes still dragging?

chevyboy07

brakes hardly ever work lol could it be injectors? or throttle body? only things i havent changed yet

ezone

Firing the parts cannon only fixes cars by accident, but it sure generates DangerZone some hefty profit.


Handy pic of a parts cannon:



Doing what?

chevyboy07

well anything i've found to be a possible or even logical reason for this i have changed. not throwing parts at it if its a logical theory. i am not a "parts changer" im just un familiar with hondas

ezone

I don't solve problems by throwing parts.



Are the brakes still dragging?
Are the tires flat?
What codes are in it?
Coolant temp sensor accurate or not?
Is the cam out of time?
Is the front O2 sensor any good (if original)?
Is the exhaust restricted?
Are you driving it like you stole it?



I can make a brand new Civic show under 20MPG if I try hard.

chevyboy07

brakes dont drag. there are no codes. 36 psi in all 4 tires. exhaust flows freely. head and timing belt were done 5k miles ago. drive like a normal functioning member of society. what else you need an answer for?

ezone

I'm not the one that needs answers. I'm just tossing out ideas here.

Yeah, look into these:
Fuel trim data at idle, 2500 no load, and 2500 highway load?
5-gas readings? Pre cat readings?

What is the MAP voltage at hot idle, in park/neutral, all loads off?

Got a scanner that works with this car-- engine datalist?
Manual or automatic trans?

Does the engine just feel anemic?

When did this poor mileage issue begin?


You have not figured out why the brakes "disappear", why should I assume you know that they are, in fact, not dragging at any time? After they "disappear", are the rotors freeking hot? (I have had this happen to me with my lowrider, stuck caliper caused fluid to boil and WHOA-**** no brakes!!)


Do we need to establish that you are actually calculating gas mileage the correct way? Seems to be a big problem with many people.


Ethanol kills gas mileage. Are you getting 10% E or under?
Burning the good gas?
http://www.toptiergas.com/retailers.html