Temp Fluctuates in stop and go traffic unless A/C is on
First of I really appreciate this forum and it is such a big help.
I have an 87 maxima wagon, automatic with 71k miles.
I recently purchased it and have noticed when I am in stop and go traffic the temp gauge goes a bit past the middle ( between hot and middle). As soon as I start moving again for a period of time it goes back to normal (just a touch under the middle of the gauge) . Additionally I recently found out on a warm day if I run the A/C, the temp gauge stays normal ( just under the middle mark) regardless if I am in stop and go traffic. This is my first Nissan maybe this is normal but I am assuming not. Any ideas? Maybe the coolng fan doesn't work unless A/C is on?
Oh yeah I dont know if this ties in but as soon as I turn off the A/C the I get a sulfur smell out of the vents.
Thanks so much for any advice