Temp Gauge problem

[Buddahwolfie 0]

2.8 vr6 with AAA engine. All of a sudden when driving the temp gauge drops down from half to the last line before 70. When am at a standstill the temp needle goes back to half where it should be. The keeps going on while i am driving.

I have put the car on my diagostic machine and i get a tempsender switch faulty - intermitant. I have replaced but senser at the front near the manifold but still doing it. Any idea's guys.

[bigpol 0]

broken wire perhaps??

[Buddahwolfie 0]

Thanks anyway but i have sussed it out, think its the thermostat

[LadVR 0]

I had the same problem recently and it was the thermostat as you said. Don't make the same mistake as i did though, change the housing for a new one whilst you're at it as well as they warp slightly. I had mine in bits about 3 times trying to stop it leaking, it cured it once i changed the housing.

Sometimes you have to learn the hard way!!!!!