temp gauge question

[386kustoms]

i just picked up a 70 custom 10, anyway i had to take the intake manifold off to do soem work, after putting it all back together i started the car and noticed my temp gauge was bouncing very fast back and forth from cold to hot, i looked at the green wire inder the hood and it was striped in spots so i replaced a couple feet of wire, anyway not the gauge wont move off cold, is there any test i can do like grounding the wire or anything to find out where the problem may be?

[SS68]

same problem here, does your green wire have a plug that goes into the sensor? or how is it plugged in?

[Cunit69]

Check your connections sounds like your butt splice isn't crimped good.

[SS68]

can you elaborate on that, (Check your connections sounds like your butt splice isn't crimped good) where is said butt splice?

[Cunit69]

(i looked at the green wire inder the hood and it was striped in spots so i replaced a couple feet of wire,)

In order to replace a couple of feet of wire a butt splice would be necessary.
SS68 Did this answer your Question?

[Andy4639]

Where the wire connects to the sendor on the motor and where you tied the new wire into the old wire check for good connections.

[VetteVet]

http://www.6066gmcguy.org/Electrical-02.htm
scroll down to the water temp gauge

[ChevLoRay]

If the wire (green, encased in a heat shield) comes into contact with the engine, the guage needle will move everytime it grounds out. I once had a problem with my wiring and the needle bounced from hot to cold so fast I thought it would break off.....as I bounced down the road.