Flake1820

Doesn’t fluctuate at idle, none of the other gauges have an issue besides fuel doesn’t work at all because of the sending unit. But I just unplugged and plugged back in the single wire going into the sensor and it seems to work now? Lol weird

So I have a 97 12 Valve, and my coolant temp gauge has been fluctuating bad. Idling it’ll sit at 180-190 and then when you get on the throttle it shoots to 230+ and let off the throttle it goes back to 180-190. I’ve replaced the thermostat, thinking maybe it’s the coolant temp sensor? How often do those go bad? Thinking about just running a new gauge to get a more accurate reading and by passing the factory wiring. If I was to do so could I install the probe into the sensor hole on the back of the block?? Or could I use the plug on the top of the thermostat housing??