temp needle moving back and forth
 

in the last few days i've noticed some really strange things happening with my temp guage. it'll move to the "fully warmed up" position with no problems but if it idles for along period of time (over 10 mins) the needle moves up close to the hot position, but a few quick blips of the throttle and it moves back down to normal.

now, if i gun it on the highway to try and pass a transport or take it to the strip, the needle moves all the way down near the cold mark. then returns to the normal position once i resume a normal speed.

what does that sound like to you guys?

Re: temp needle moving back and forth (hott-nix)
 

search for thermostat and ect switch , and temp gauge sending unit...

Re: temp needle moving back and forth (JH4DC4-2GSR)
 

ju most likely need a new thermostat

i think i have a pretty good diea of whats going on. thanks for the search keywords, it helped alot