temp guage help???

[blks14z]

WTF is wrong with my temp. guage. When i'm in gear, if i hit my gas pedal hard, but not full throttle, up to about 4,500 rpm, my temp guage needle would go down, then up. (Kinda like a vacuum guage). BTW my car is 96 s14 stock. I do have a boost/vacuum guage hooked up though. Anyone know what's wrong with it??? Any help would be thankful. Thanks

[MyLevinGTZ]

i had that problem. connector to the water temp sensor was poor. clean up the one wire connector by the TB for the water temp and it should help.