[KatoKato]

Hi All. Just finished my premuffler install on the 86' 911.

I put in a new O2 sensor and as I am a newbie I was wondering if there were any "tell-tale" signs that the sensor is working.

The only evidence so far (I think) is that when cold the engine idles @ 1100 rpm and once warm idles just over 800 rpm.

Are there any other ways to tell if it's working (or not?)

Thanks in advance,
Kato