I've changed plugs,wires,fuel filter, cap, rotor.

still running rich, burning mad fuel.

any suggestions? could it be an injector spewing to much fuel or the y-pipe o2 sensor not mixing correctly?

im kinda stumped on why its still running rich after these changes.

 

Bone stock car?

 

yeah, no upgrades, just a regular b18b1

stage 3 clutch and 9.2lbs flywheel though, thats it.

the cat is old though and im thinkin the o2 sensor might be bad but would that burn excess gas and ruin fuel economy and run ricccccch?

black residue of burnt fuel comin out of tailpipe too

 

Yes an old and clogged cat converter can cause bad gas mileage.

 

o2 sensor

 

Typically this is an O2 sensor issue as mentioned above.

 

I would have to agree with everyone o2 sensor. The sensor is probably bad and the ECU is running at a continuous ‘open loop’ state burning more fuel then needed. Here's a long shot, an injector could have failed in an open state in turn a continuous flow of fuel would be delivered but the ECU would still catch that and throw a code pertaining to the specific cylinder/injector causing a CEL

Any CEL's to report?

 

i thought it was the 02 aswell so im gonna change ito ut, but honda wants 300$ for one, any 1 have a link or site to order one for cheaper?

what brands are good?

i do have a cel, but the cel is a TYDC cel #8

it has been on for years and isnt the cause of the rich problem cause it ran fine b4 with this cel, ijust havnt goten around to replacing the entire dizzy to fix that cel heh

 

o2 from any local autoparts store works fine.

 

so if i order one from rock auto that costslike 30$ that'd be fine too? i just dont wanna end up replacing it again in a year lol n i dun rly know much about o2 sensors, do they tend to go bad alot?

 

yes. An aftermarket O2 sensor will work, and get rid of your Rich problem. BTW, How do you know your running rich?

 

when twenty bucks of fuel gets you half the way it normally does on the same PRICE of gas and type, and your exhaust is covered in black residue and smells like gas its a sign ;p

 

Just went through this same problem on my 96 teg all stock also.I had two bad o2 sensors and no check engine light went from 320 miles freeway commuting to 280.Replaced the sensors and gas mileage went back to normal.

 

my 95 teg seems to only have 1 o2 sensor, how much did u pay for your o2 sensors btw?

what brand did you buy? and where from

 

I bought the NTK off rockauto the front one I think was 50 somethin and the rear and 80. I wish I only had one o2 haha

 

so hey how did they work for you? same size? extra wire length? any modifications needed? plug n play?

lmk your results, how long have you been running them?

 

40 bucks from autozone

 

there are many problems that could cause a rich condition. o2 sensor is just one.
have you tested your ect sensor? if it isn't reading correctly, it would keep the system in open loop as well. you can test it by checking resistance first cold, then hot. compare the readings to spec.

also, not all o2 sensors are created equal. the lower grade ones use poorer quality metals which tend to contaminate earlier which sends the pcm false lean readings.
denso is a good choice, but more pricey.
i wouldn't worry too much about the cat, as it's job is to deal with emissions after the fact. a clogged cat would cause driveability issues more than anything.
however, an exhaust leak upstream of the o2 could cause a rich condition by allowing oxygen into the exhaust and giving false high oxygen readings to the o2. the lean signal is sent to the pcm, and the pcm compensates by dumping more fuel

 

It was straight plug and play the wires were a lil longer then stock but better longer then shorter, and i have been runnning them for about 2 months and havent had a problem yet.

 

interesting point.

a shop took off the y-pipe with the 02 in it to do a clutch swap, i dont think he put the donut gaskets in correct.

do you happen too know the part numbers for these gaskets?

and what is the ect sensor?

 

ect=engine coolant temperature sensor. it relays signal to the pcm in regards to engine temp. it plays a detrimental role in determining fuel trim.

if the donut gasket were leaking, in order for it to have an effect on o2 readings, it would have to be upstream (before) the o2 sensor

 

tru well that rules that out cause the 02 is after the join in the cat and ypipe. hmm

so where is the ect sensor located?

i need a new exhaust anyway so im preparing to get a new cat back exhaust wihth tax return and ima throw in the 02 sensor and change my plugs again.

im also gonna throw in a new dizzy due to im runnin ga #8 cel TDC sensor.

if the richness still proceeds to be present then i guess change the headers?

everything else is done. so id be hella stumped if these fixes do not take the richness away.

in www.rockauto.com going to acura integra 95 rs 3 door then exhaust system then 02 thereis a denso 02 sensor for 40 dollars n some change. is that worth getting?

 

you mean the o2 is downstream from the possible leak? lol. fix that leak (if it is leaking) before anything

ect is located under the distributor. of the two, it will be the sensor to the left. 2 wire connector

 

nono i mean its in the y-pipe before the cat. lol depends on which way you look at it

before the cat meaning its between headers and the cat.

also can u get me a picture of the ect?

and that 02 sensor onj rockauto the denso one for 40 bucks would be fine?

 

poor fuel economy possible causes:
leaking injector
plugged air filter,
plugged catalytic converter,
incorrect map reading,
temp gauge to ecu signal incorrect,
heated 02 sensor circuit,
and basically anything that would cause it to run in loop mode all the time.
loop mode is a short term fuel reading that causes your ecu to change your pulse width on your injectors to allow more you fuel and fools your map reading. this allows your engine to warm up and hit operating temp sooner along with run smoother due to the colder air intake that comes from a cold engine bay.


IS THE CHECK ENGINE LIGHT ON IF SO WHAT CODE DOES IT THROW??