No gauge change. I've tried everything I can think of or read about.

There'* only one thing I believe you haven't tried.

New cluster or different main pcb.

That'* what I meant.

Stupid gauges worked half the day yesterday, and all of the 45 minutes I've spent in it today. Last time they worked much was during a rainy few days, now it'* during a coolant leak...

Mine work occasionally to. But rarely. Worked a couple days ago for like 5 minutes before everything went dead.

Shoot some water at the pulley end and a little at the ICM bracket (make sure not to soak your coils or ICM) and see if it affects your gauge behavior.

You can hose off anything under your car except directly spraying the alternator w/o worries as long as your wires are good.

The guages are holding out still. Maybe the coolant leak was shorting out something? Or it just hasn't dried/cooked out yet.

The connectors under the hood have a weather seal on them. If you are having gauge issues and wetting your engine fixes the problem...then what is your pcm seeing? It would see the same crazy data.

The only gauge that did anything weird that the PCM also needs info on was the coolant temp. The PCM and cluster use seperate sensors, but I'd think they ground the same place. I've spent a lot of time with my scan tool plugged in so I can watch it, and it was always normal acting. And they are on the opposite side of the engine. I haven't gotten any crank or cam sensor codes. The only code I sometimes get is a TPS low code.