New o2 sensor not working

[2g spyder eclipse]

Well my front o2 sensor went bad causing my car to run crazy lean at idle. It would idle at 18afr. I unplugged it and it went right back to 14.7-15.0.. I went and bought a new o2 sensor and hooked it up but now it's right back to lean?

 

[ohyeah]

If you got a wide band try taking that out see what happens then.

 

[koafallenangel]

What your idle at? sounds as though your idle is too high.

 

[Afizzle]

The advice given on this site is hilarious sometimes.

The issue is not your o2 sensor, rather, what the sensor is sensing. Check the obvious, such as MAF plugged in, injectors seated properly with no leaks. Run a boost leak test to ensure you have no intake leaks. Could also be your pump or fuel pressure regulator. The pump may be failing and not supplying the fuel it thinks it is, or the FPR might be failing and isnt maintaining correct fuel pressure.

Also very likely to be your fuel filter, those are 6$ at any parts store and a good idea to change regularly to dodge problems just like this one.

Its honestly kind of hard to say without knowing yuour mods. Are you still on stock tune or using any means of tuning the car?

The advice given on this site is hilarious sometimes.

The issue is not your o2 sensor, rather, what the sensor is sensing. Check the obvious, such as MAF plugged in, injectors seated properly with no leaks. Run a boost leak test to ensure you have no intake leaks. Could also be your pump or fuel pressure regulator. The pump may be failing and not supplying the fuel it thinks it is, or the FPR might be failing and isnt maintaining correct fuel pressure.

Also very likely to be your fuel filter, those are 6$ at any parts store and a good idea to change regularly to dodge problems just like this one.

Its honestly kind of hard to say without knowing yuour mods. Are you still on stock tune or using any means of tuning the car?

 

[boost97gst]

So unplugging the connector to the front o2 and you get good afrs right? Well, that means in open loop your afrs are correct apparently. Thats odd but ive never tried it so it may not be. You need to fill in your mods list and we can help a lot more.
To me, it sounds like bad wiring, poorly calibrated WB or something to that effect.