[ljowdy]

Thanks for the replies.

My friend has the 3.2 and worries about everything.

In fact some of his worries are contradictory in nature. One minute, he wants to check is CO for accuracy but in the same breath, he doesn't, because he believes that the 02 sensor will correct any emission problems.

note: I have volunteered to check and adjust his CO using my Gunson's Gas Analyzer but so far, he has resisted because he unrealistically believes that it's intrusive.
(my god, it's not a colonoscopy)

I tried to explain that it's mechanical and anything mechanic is subject to failure or in this case adjustment.

This information is exactly what I need to show him..