Utterly horrible gas mileage!!!

[SHODOGG]

Ok, heres my next problem: Before I got my new plugs and wires, my car ran like total crap. Most of the time when I tried to accelerate, it would backfire and stutter and all that. But I still got 17.5 MPG. Now, with new plugs and wires, the car runs absolutely perfect, but is now getting absolutely terrible mileage! My last check was 14.3MPG! I just replaced an O2 sensor that was throwing a code at me so hopefully that will help a bit but if not, what do I do??

 

[sdpatt]

Might want to replace the other O2 sensor. The Wells Manufacturing site recommends replacing the oxygen sensors with the spark plugs at 60,000 miles because they get "tired." They switch slowly and cause a loss of performance, emissions accuracy and fuel mileage.

 

[SHODOGG]

Well see thats the thing, both O2's were only a couple months old. I replaced them myself not long after I bought the car. Thats why I only replaced the one instead of both cause I dont even know why the one went bad

<small>[ March 27, 2002, 10:38 PM: Message edited by: SHODOG220 ]</small>

 

[Denny]

Get those exhaust leaks fixed!