hugh temp. drop question

[331 stang91]

So I was crusing around last night it was about 60 out. My car ran about 180 all night . Then after about an hour or so of driving the temp. started to drop slowly. I then had to go on the expressway and the temp droped all the way down to 130! I parked the car for about 10 min then when I got back the temp was at about 160. So I rulled out the gage not working ? Then I started driving again and it quickly droped down to 130 again. Anyone have any ideas. I have an aftermarket mech. gauge.

 

[HISSIN50]

is the stat getting stuck open?

good luck.

 

[331 stang91]

Thats what I thought but I was told that would not cause the car to get that cool?

 

[gregpro50]

Thats what I thought but I was told that would not cause the car to get that cool?

If the T-stat was stuck open it would certainly cause it to get that cool. What temp T-stat do you have and how old is it ??

 

[331 stang91]

The stat is old I was thinking of putting in a 180.
Thanks for the response so far