narrowband suddenly works different

[auker1]

After installing non tick lifters and throttle body shaft seals in my 99 eclipse gst over the weekend, my narrowband works differently. normally when at idle it bounces all around but now it stays at very lean. When i give it throttle it goes up to barely stoich and never rich even in boost. I know that narrowbands are not reliable but it was working and not it isn't which tells me something is up. any ideas why my car would run lean after small changes or if the sensor might be going out. i changed the sensor year ago with a bosch sensor

 

[rough]

You sure it's a narrowband? I had one in my 80's camaro, they simply read on or off.

A wideband will have it's own O2 sensor, which will give you 14.7 ect.

 

[auker1]

yeah im sure its a narrowband cause it says so on the gauge face. I replaced the o2 sensor and it went back to normal. I wish it was a wideband.