Low Coolant? Weak Temerature sensor? Weak gauge Gauge working properly and recording the thermostat opening and closing as engine temperature fluctuates
Thes sending unit is located inside gas tank.
When you turn a corner the guage fluctuates.
Your pressure gauge may be broken....If it fluctuates, then you know its not your gauge, but if your gauge always reads 80, it may need to be replaced.
The temperature gauge on a car fluctuates because the car's thermostat is opening and closing. The gauge goes up when the thermostat closes and the gauge goes down when the thermostat opens.
on the side of the radiator
1990 Chevrolet Lumina temperature sender is located on the back side of the thermostat housing. The sender has a wire that goes to the temperature gauge.
because your thermostat is opening and closing as the engine temp. fluctuates
Could be low on coolant or a faulty thermostat.
Because it is a Pontiac. Sorry, man.
your float could be stuck
Its in the gas tank with the sending unit and fuel pump
replace temperature gauge
This can be a sign of a bad compressor and you will need to run a compressor check first, this can be done without draining the freon....
instrument cluster needs to come out and apart to gain access and replace gauge
Take out the fuel gauge and fish for the magnet inside the fuel tank. Then disassemble the fuel gauge to replace the broken magnet. Reassemble and replace. Done...
sounds like it might be due to bad earthing. Check earth strap from battery to body to engine.
Temperature gauge may drop when heater turned on because additional coolant from heater core is introduced to cooling system - usually this coolant is cooler than what is currently circulating
Probably because it has a big tank that fluctuates. I could be wrong too though.
It's a GM
A Buick with a 3.8 liter engine does not have an oil pressure switch. There is an oil pressure gauge. The gauge can be accessed by removing the dashboard panel. Unhook the wiring harness to the gauge. Reverse the process to replace the gauge.
Sounds like it is low on coolant.
If it is the gauge you have to pull the gauge cluster. If it is the cable you have to get under the car and replace it. It will be the only cable on the tranny. Good luck
You sure it is the gauge that is broke? I bet it is the sending unit.