They might be the choice of many, but they can be a real pain in the arse. Mine frequently looses its calibration, and looking online, it seems I'm not the only one.
yea i have heard of this,
putting them in the wrong angle in the exhaust makes them mess up alot i know.
My probe is fine, and installed correctly. The problem is, whoever designed the electronic hardware either cocked up - or hasn't got a clue about designing electronics for automotive applications. It seems the nasty transient voltage spikes you get whilst cranking send the thing spastic.
I'm planning on re-wiring mine so that it comes on using a separate switch, so I can turn it on after I've started the car. It's either that, or speak to some fucktard American to get it sorted. From what I've read online, newer LC-1s are fine.