hey guys im new to the honda world, been in the dsm world for 3 yrs now and got my hands on a b16 96 hatch, im not sure whats done to it, but i do no it has cam gears, header exhaust intake, well its gettin about 10mpg. what could be wrong with it, i did notice there was no o2 sensors in the header. could that be all

 

mine was wasting a lot of gas an a vacum leak from the throttle body was causing it...

 

unless its chipped to not need o2, you gotta have them. then check the basic maintenance stuff and timing.

 

thanks im goin to have to check everything out, its just been so cold here latly and i been work so much i dont have time to do nething nemore

 

i just went and looked and the throttle body has no vacuum lines coming off of it, and there is no vacuum line places to hook them up at all.

 

what size gas tank did the 96 civic hatches come with

 

guess no one wants to help me

 

should be a 10 gallon tank. atleast thats what my 95 civic dx has.

here is a few things you could try.

try using some gas treatment.
check for holes under your car (intake pipes) mainly caused from bottom'n out

 

what do i do about the o2 sensors? how many should there be?

 

get some new ones thats always ganna help.

 

do i need one or two, and what do i buy them for its a b16a i have no idea what yr make modle it came out of.

 

you need 2 O2 sensors. one before the cat and one after the cat.

 

mine is in the same boat but i have a bad o2 sensor so thats most likely your problem

 

goin to have to get them in, i dont think i have a cat tho? what do i buy them for

 

You need to figure out EXACTLY what that car has and doesn't have.
THEN you can get very accurate help. Has it EVER been tuned? Any CELS? Correct ECU? Chipped? What is the vtec crossover point? What is the rev limiter set to? DRIVING HABITS? 10 mpg is like 1/3 what you should be getting. Maybe someone practiced their tuning (dis)ability and gave up when the car lost 15 whp and then gained 2 on some dyno?

 

i have no idea what is done..... vtec hits about 5500, i dont think its ever been tuned, idk ill pull the ecu out and take a look

 

my only gets 160 tank,i also has no ideal.

 

double check your exhaust manifold and gaskets, if you bought cheap headers they tend to crack at the collector, pulling air in between power pulses. the o2 sensor then reads lean and dumps more fuel in to compensate

 

you say that you dont have a cat?
well do you have a test pipe? or is it just a straight pipe?

 

Due to the OPs lack of writing skills, I have a headache from reading his posts and cannot help.

OP post some pics of the cat, throttle body and ecu.

 

^^^^^^x2