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Non-FE Discussion Forum / Re: Anyone using an A/F gauge in their car?
« on: December 11, 2025, 10:23:53 AM »drdano, letting the sensor see exhaust before getting powered up is usually recommended against by the manufacturer. ( unless I’m misunderstanding your sequencing).
Correct, that is the recommendation I've also tried to follow int he past with poor results. I killed a half dozen of the old sensors trying to power up, fully heat the O2 sensors prior to even starting the engine. I assume that moisture in the system was damaging them. And yes, I have BBQ'd a sensor or two of the older type by accidentally leaving them in the exhaust unpowered. The current LSU 4.9 sensor I've been using now doesn't get powered up until the exhaust in the car/bike has been running for 15 minutes and the engine is at operating temp. I've yet to kill this 4.9 sensor and the LM-2 seems to behave more predictably using this procedure for me.

). Any better suggestions?