I just recently swapped O2's for giggles since I was replacing all sensors to include plugs, wires etc. I noticed that when I leave the old sensors in the car sounds a little flat w/ the exhaust tone. Once I put the new ones in the car had different sound altogether like it should sound this way vs the old way. Has anyone else experienced this? My mileage didn't change none from the swap and the throttle response is a little more crisp but that's it.

Just wondered if anyone else can confirm this or not. The old sensors only had 5K on them as well.

Thanks!

 

bad o2s will change the sound of your car only in closed loop when their input is used, and then only if its causing the car to give such a lean or rich mixture that the engine doenst run well. Mine would stumble and go back to open loop and become smooth again.

 

Hmm.......I guess I'll have to keep an eye out for that as I'm running rich. Thanks for the info.