Another Temp Guage Conundrum!

[jenkznza]

I have a 96 stock explorer (4.0). During a road trip the other day the temp gauge went to hot and my warning light came on. I hit the brakes and the gauge dropped. The next time it happened I gave it gas and the gauge dropped. I went home and replaced the sending unit and TStat. Now the gauge goes from cold to hot in short order. I took temps on the sending unit to find it at 143 and the head at 185.

Any thoughts? Is there an after market gauge anyone would suggest?

Thanks in advance.

 

[gtyates]

Maybe air trapped in the system? My daughter's 626 did the same thing. I "burped" the system by opening up the coolant tank and letting the car run a few minutes with heat on to let air bubbles out of the system. Sounds crazy, but I could see the bubbles come into the tank and "pop". When they quit I placed the cover back on the tank. Has not happened again and this has been 6 months ago now.

 

[jenkznza]

I'll give that a try. I'm about to put black tape over the warning light and call it good! LOL

Thanks