Tuesday, September 9th, 2008 AT 5:50 PM
I am having a problem with my 2000 f150. My temperature guage rises when I am going up hill and traveling at about 70mph for a while. I have changed the thermastat and it still does it. There is no engine light that comes on and I have had the coolant pressure test done on it with no problems. Is there a possibility it can be the egr valve? The fan is also working fine. Any suggestions?

