N/t non heated o2 sensor in exhaust- is it needed?

[Ifurnotfirsturlast]

Hi guys I just had a question about this. I recently put a new catback system on my 96 eclipse rs and I could not get the o2 sensor out of the resonator so I cut the wires with the hopes that once the pipe is out I could get the sensor out and solder it back together. Well that sucker is in there good ad still haven't been able to get it out. I put the new exhaust on and came to find outt cat is basically blown up haha so that will be getting replaced here soon. But anyway i naturally took the car for a spin after the exhaust was on with no sensor on still and the CEL is not on and it runs fine other than the massive leak from the blown cat. So my question is do I even need to worry about replacing that sensor?

 

[Aproductions]

to pass emission yeah. Do you want the cel on?

 

[DSMAvenger]

Yes, you need to re-install the sensor or install a new one. Spray PB Blaster or some sort of lubricant on the O2 sensor and use a mallet on the wrench open ended side (closed end side over the o2 sensor) if you need some extra leverage. It should come off

Chris

 

[WalkerTech]

Infurno,

I am a product specialist with Walker Products, a manufacturer and and worldwide distributor of oxygen sensors. I certainly agree with the other posts; you need to keep the O2 functioning. No matter how great your new exhaust will make your vehicle sound, it's not worth it if you let the overall health of your engine suffer. Besides the CEL situation (very odd that it is not on) and emissions concerns, driving without this O2 will hurt your gas mileage and work to cancel out the good that your other O2's are doing for your engine.

 

[WES_393]

I'm no 420a buff, but with 99% of cars the upstream O2 is for fuel injection control while the downstream (the one mentioned in this thread) is just for emissions and inspections. Can it have an effect on gas mileage? It's possible. But the major reason for it's existence is to measure how efficient the catalytic converter is working for emissions testing. So if you have emissions requirements in your area, you'll need it. If not, do I need say more?

 

[Ifurnotfirsturlast]

Thanks for all the input guys. I suppose it's there for a reason so I'd better out it back on but until that actually gets done I'm not too worried about it