Ever since I had the 2.25" catback exhaust installed, I've only been getting 23.5 mpg. Turns out it was completely fixable. Took my car to The Dyno Shop in Santee, CA,and they figured out my O2 sensor was bad. They replaced it, tuned up the car, and voila.

It runs sooooooooo crisp and clean, now, sounds 100% better. Wish I'd done it a year ago.

FYI - If you have a K & N filter on your cold air induction, they said only use the aerosol type of oil, and to use it sparingly, or else it will gum up some sensor wire or diode to the mass air flow meter.

 

Well i say congrats on having a smooth running car back again, bet that will help the wallet out a bit, and help with the ponies under the hood. Thanks for the FYI, i dont personally have a K&N but im sure quite a few people do.

 

how much you pay to for the O2 sensor?

im getting 20 MPG

 

The cost of the O2 sensor, itself, was $125.