[dcarter]

Sorry to revive this old thread, but I recently purchased this beautiful 82 from Mike, and this issue he was troubleshooting back in 2010 still exists. Since lots of experts were involved in this thread, I thought I'd ask again for any ideas.

To recap the issue, when accelerating briskly, and sometime when taking a turn quickly, the high temp warning light comes on and also triggers the central warning light. The needle on the temp gauge is in the normal zone. The High temp warning light goes off fairly quickly, and when you push the ! button, the central warning light goes off. I've also noticed that at highway speeds, the high temp light sometimes flickers a bit, which triggers the ! light, making me think maybe high speed air flowing through the front of the engine compartment is moving some wires around that may be shorting.

There is lots of talk in this thread about coolant level, but I don't see how that could trigger the high temp light.

I've checked the wiring and plugs to the temp sensor on the water bridge, but they look ok. I also had my son watch the light in the car while I wiggled wires all over the engine compartment trying to get the light to come on, but no luck.

I'm thinking swapping out the sensor might be a good next step. Haven't done a good ground cleaning yet, but need to. To confirm, the high temp warning light gets it's signal from the sensor near the water bridge correct? Is it direct, or is there some circuitry interpreting the signal that could be faulty? If it's the same sensor as on one of my other 928's, I'll just swap it out and test (86.5, 87 & 89).