Rep Power: 0

hello all ! i have a 2005 honda civic EX sedan , during last week my MPG dropped from 30 to 23 i drive around 120 miles a day so thats a kick in the nuts :/

my exhaust manifold has been leaking , and i ordered a new O2 Sensor . is there anything else available to cure my mileage problem ? thats what i got after lurking through the forums.

and a month ago my "maint. required" light came on , what should i do to turn it off ?

thanks a lot and i did search through the forums hope u guys could help me out

 
Rep Power: 242

A bad O2 sensor can give you bad mpg. Did you order a Honda sensor? Has it had plugs lately? Air filter clean? Tire pressure good? Get exhaust leak fixed.

To reset the maintance light you have to hold the trip button down while you turn the key to position 2. Wait 10 seconds and the light will reset. I think it flashes when it resets.

 
Rep Power: 0

tires pressure and air filter are good , my sparks are 20,000 miles old i ll change them tomorrow and fix the exhaust this week thanks a lot anything else i should look for ?

 
Rep Power: 0

and thanks a lot the light thing worked

 
Rep Power: 517

The correct plugs are good for an easy 100,000+ miles (as long as nothing fouls them).


A cracked exhaust manifold leaking exhaust can cause false readings from the O2 sensor, and the computer tries to add extra fuel to compensate.


Winter blend fuel can cause a drop too.


More:
http://blog.gasbuddy.com/posts/Winte...22955-413.aspx

http://www.metrompg.com/posts/winter-mpg.htm

 
Rep Power: 252

Put the right parts, use the correct OEM plugs and check your air filter.

You need to fix your problems, of course your mpgs will drop with the problems you stated.

 
Rep Power: 0

thanks a lot guys everything is properly fixed except the manifold , amd already returning 25 MPG