What Should I Be Looking At To Fix?

[sladeo r33]

hey guys and gals. im having some problems with my r33 gtst series 1. when im driving only some times it feels like it drops in and out of power. but i have noticed when my air/fuel ratio gauge lights go out while driving thats when it does it. i have change my o2 sensor and it ran good for awhile but now it seems to be getting worse. just wondering if any would be able to help me out im out of ideas. thanks heaps

[DVS JEZ]

More info needed, is it a 02 gauge that uses the stock 02 sensor?

Does it drop power on boost or only off?

[sladeo r33]

i have changed the o2 sensor from the stock sensor. its just air/fuel ratio gauge

when im not on boost it does it?

[mad082]

if you have one of those air fuel gauges that works off the stock o2 sensor, then at light throttle the lights should flicker between rich and lean. when you floor it it should go full rich, and when you lift off and decellerate it should go full lean (possibly even off the scale).

when the o2 sensor stops working it should sit in the rich side of the scale regardless of what amount of throttle you are using. if you are driving along and it is suddenly altering the output then it may be an issue with the loom, or possibly another issue. it might be worth checking the fault codes

[sladeo r33]

ok because it works fine exactly how you said and then all of a sudden the lights on the fuel/air gauge goes it just feel like it bogs it self down and the turbo doesnt feel like its spooling or any thing?

[sladeo r33]

goes out