Coolant problem, need help ASAP!
We went driving around tonight and the temp gauge was acting all f'd up
If we sat at a light it would goto 210*, or maybe just above it.
When we drove it it would go to like <180*. Then all of a sudden, the low coolant light came on WTF? So we pulled over and popped the cap off. The level was right up to the top.
Does the car need to be cold to re-fill the coolant? What other problem could this be? A bad sensor?
please help, he is sitting right here with me, thanks.

