Temp Gauge won't go above the middle inbetween "N" and C -Cold?
I'm not sure what happened but my temp gauge refuses to go above the middle point between cold and N in NORMAL? It was typically always between N & O in Normal or R if it was really hot (middle of the gauge). It does move but it no longer goes to where it normally should be.
The car runs fine, has about 3,000 miles since the headgasket replacement (rebuilt cylinder heads (originals were trashed), new felpro gaskets, arp head studs, etc) and ran completely fine for a 800 mile road trip in 90 degree heat with the AC running constantly. T-Stat was replaced when the headgasket was done and then re-done again (it was leaking from the housing) by a professional mechanic, no problems with it at all.
I also check the coolant levels, they are fine and there is no air in the cooling system. Both the heat and AC work perfectly as well. The only issue I noticed is if it sits a few days, it idles very rough and stumbles for 5 minutes then runs completely fine?
I did notice a faint winding squeak in the cluster earlier this month but it has yet to return? I'm not sure if the actual cluster is going bad (the odometer/trip minder still works) or if this is a bad coolant temp sensor. I'm leaning towards the CTS myself because of the odd running when cold but it seems very odd that gauge would work at all if it's bad.
Thanks for your time and your help.