Honda Repair: Emmission Fail and low millage, powertrain control, honda accord ex

Question
Hi Bill,

I have 1995 Honda Accord Ex 4dr.recentlly I get my car emmission tested. It failed on O2 level I puted new orignal O2 senser. and get tunned the car i.e changed all sparkplugs,ignition cap,routers and wirring. in spite of doing all it still failed. now my per liter millage is also come down . previously i was getting around 10kms in a leter of gas now i get only 6-7km. Please advise what need to be done.

Regards

Rajeev

Answer
Rajeev:
The O2 sensor is controlled by the Powertrain Control Module (PCM) mounted in the distributor and that is sending the signal out on whether the gas mix is too lean or too rich and it will adjust according to the readings. If the O2 is installed correctly your problem may be with the PCM. You may end up taking the car to a shop to diagnosis because they have all the diagnostic equipment to tell what is going on. The emission test can only tell the symptom and not the cause.
Sorry I can't be of more help.
Good luck.
Bill