my 92 gxe temp gauge acts a little funny..i turn the car on to warm it up then sometimes it goes to the middle of hot and cold and then a few minutes later is below the cold line..then few minutes later it goes little over cold line then goes back down below the cold lin eor back in the middle...anyone know the reason for this...

 

My knee jerk reaction says it's a thermostat becasue I've never heard of our guage or sensor being that irratic, but you could be the first. There's a way you can test the gauge by grounding out the harness connector for the sensor, doing this the gauge should peg out to full max/hot

 

did you check the coolant level? its possible you are low on water.

 

i check that but what am gonna do it bleed the system tomorrow and see where it goes from there

 

My vote's for a bad thermostat. Mine was similar - had it changed, then things are happy again.

 

ok then ill have my mechanic check it..but how hard is it to change a thermostat

 

Its a pain to get to But its not to hard to replace !

 

Sorry to bring up an old post, but mine does the same thing. Smack the dash a couple of times and see if it jumps to the correct reading. Mine does that. (Thumping the dash doesn't always correct the problem, but sometimes it does.) I believe a circuit is just bad, or a connection behind the dash. When I am not so lazy, I will fix mine- but I don't think it is a difficult fix.

Later,
JP

 

it was the thermastat..i got it replaced thanks