lippies

just a quick question.... do u need to have headers and a ypipe to delete ur rear 02 sensors.. i have a borla catback running straight back. thnx.

conor.davis

iTrader: (20)

why do you want to delete them?

lippies

because my SES light is on and my mileage is really sucking right now.

conor.davis

iTrader: (20)

yeah you can delete them

conor.davis

iTrader: (20)

by tuning them our or rear o2 sims

lippies

what the price range for a tune or the 02 sims? thnx

X-ray

iTrader: (6)

Your rear o2 sensors have nothing to do with the mileage your getting. Rear o2 sensors only check if the catalytic converter is working, nothing else. It is possible your cat is bad or plugged up, causing the SES light to come on, and the plugged up cat would affect gas mileage.

But if your gas mileage is bad it's more likely the front o2 sensors. They're the ones that tell the engine how to change the fuel/air ratio. If they go bad, then the car will run really rich.

Either way, having your rear o2 sensors tuned out won't improve your gas mileage.