O2 sensor fitting to test exhast back pressure

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1

I will be needing to test my exhaust back pressure after I replace the thermostat and temp sensor on my Envoy.
It has been advised that my cat is probably plugged with crap. I’m sure the 38,000 miles of 2-5 mile commutes does not help :slight_smile:

Sure I could buy a $45 sensor and use the existing one as parts to make my own fitting, but I hate replacing parts that appear to function fine.
Unless my truck has been running so poorly that the sensor is also shit.

Does anyone have something I can borrow, or know where to buy a cheap fitting to do the job.

2

So you need just a junk o2 sensor?

3

Presumably, that should work so long as I get to keep it :slight_smile:

4

Throw an ebay test pipe on it and kill some pandas.