did you get a universal one or one that is car specific?

 

need to have a code read done

 

Is it possible that the O2 sensor could be bad and the CEL does not light up? I have been getting TERRIBLE gas mileage on my 93 Civic EX with on 66000 miles. Last time I checked, I was getting 22 MPG. I have tried everything you can to tune the car up. Has anyone else had a bad O2 which did not set off the CEL?

Thanks.
Daniel

 

idk, usually if the sensor is bad the CEL will come on. Maybe the fuel filter or air filter, You got an aftermarktet intake?

 

bosch - universal though.
had to crimp on connectors; also sliced to have more wire

 

I have replaced the fuel filter and the air filter and am still getting the same sh*tty gas mileage. I am about to give up on it.

 

how is the idle ?
is CEL on?
have you checked the timing lately ??

 

The idle is a little rough. Not jumping or coming anywhere close to killing the car, just rough. It causes some vibration. The CEL is not on. I have not checked the timing belt. Is there a DIY on how to do this? I have not checked a timing belt before, but am more than willing to give it a try. Is it in the Haynes manual?

- Daniel

 

You'll need to rent a timing light/gun to do it...i would just bring it to a shop...they will do it for like 20 bucks i think..thats the quote i got to have my 92 cx timed

 

0-2 senser are not always cheep i called around for one on my civic HX and its cost between 350 and 385$$$ so make sure you are getting the right one for your car i did not think i needed to pay that much and bought two for my civic but did not work luckly i got them for only 25$ each but still a pain thinking i got one that will work. maybe its just my model car but ask around for the cheapest price. Mine has been bad for some time but i dont have the money to fix it right now got other problems so dont worrie and think it needs replaced right away you have time just dont beat on your car.