TiGeRC|aw

I just got a new radiator put into my 1990 GXL. The last one cracked right under the patent stamp. I was driving it today no problem and all of a sudden my thermostat on my dash was all the way up to H. i was like what the heck and let go of the throttle. It instantly went down again to a bit above normal running temperature. I drove it home and watched the thermostat go up and down like a rollercoaster. I let it idle at home and the engine seemed to be cool, not hot at all.

I was thinking maybe i need a new thermostat? Or any other ideas? Thanks a lot

Osirus9

iTrader: (10)

it might be a bad sensor?

might as well replace the thermostat first though. they are pretty cheap. just don't buy a stant one, get the OEM replacement. Spooledupracing sells em on the forums.

Omixeo

iTrader: (1)

OEM thermostat and OEM radiator cap.

riverzendz

Why is your thermostat on your dash? It can't get coolant flow there so that's probably the issue.

Aaron Cake

iTrader: (1)

Did you bleed the system of air bubbles?

Also, if the temperature gauge wire is shorting to ground, the gauge will shoot straight up.