fuel tank 305 full tank

Hotrodz

We all take a little ribbing at times, but you will get good to great advice if you are patient. Jordo advise I would pay attention too! Also since you got a new exhaust system you may be running rich and that will lower your mpg's. You should think about get an tune. Really, you are not that far off if that is city driving alone.

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jamesj1996

yeah i think o2's are fine i have a buddy who works at nissan check the car out for issues every month he said its all fine. im getting uprev tune next week. thanks for the advice

Jordo!

The O2's are pretty sensitive. If your originals were fine, removed, and re-installed, that alone could have damaged one.

My problem was a bad heater wire on the sensor after removal and re-install for headers. The O2 couldn't heat up enough to get out of the warm-up cycle. The result was mpg like yours and an intermittent stumble at idle.

Weirdly, it didn't happen right away -- it got gradually worse over time -- and other than the mileage and occasional stumble, it ran fine.

If you have a buddy at Nissan, ask him to hook up Consult III and monitor the O2 voltages, heater corrections, etc to make sure all is good.

Good luck!

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