What's up y'all? I got a quick question for y'all. I have been having a few overheating problems lately but now I'm having a weird pattern. My truck runs under optimum, about the "N" of Normal on the temp gauge, while I'm driving it. However, if I stop at a red light for more than about 30 secs it starts to rise in temperature and eventually gets to about the L in normal on the gauge. Once I continue driving though it begins to go back down and eventually goes down to just below optimum. I also did a coolant system pressure test and it only leaked 2lbs in an hour and it could have very well been the tester itself since it was a rental and they are infamous for that. My other post might answer some of y'alls questions, if not just ask me. I'll tell you whatever I can. Thank y'all so much!

Here's a link to my other post. Thank you again.
http://www.fordrangerforum.com/3-0-v...ease-help.html

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1994 3.0L, 2wd, Standard shift, Ext. Cab

Water pump possibly. If it's never been replaced, the vanes are probably rusted away. Could also be a bad fan clutch, which could make it overheat at idle since the fan isn't spinning fast enough to cool the engine, but the air over the radiator while driving cools it back down.

Kinda sounds like a clogged radiator or water pump have you tried flushing the cooling system yet