I am sure you already did this, but bleed the air from the top petcock on your radiator again,
I find after I run the engine it always gets some air in mine. I assume you have the stock gauges? A stock motor? A stock sensor?
The wiring on the Pantera is sometimes a real mystery, when I first got my car, I would turn on the lights and the temp would go up! I ended up running a wire directly from the sensor outside the normal loom.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.