Hi guys, I have a '92 auto lude SI and these last couple days i have been experiencing some temperature problems. My gauge shows only 1/2 the regular temp and sometimes bounces to normal then to zero. Also when that started happening, my rpm's stayed a bit higher then usual...and now goes all the way up to 1800 rpm when in gear....sometimes only drops down by shifting it into neutral. Any ideas what might b the problem? I thought maybe the temp switch? does the temp switch control the rpm's as well? Any suggestions would be greatly appreciated,

-Joe