Temp gauge move's when car is started but as the car heat's to normal temp it stays buried at the bottom and cooling fan's run continuously. If i drive the car for say 10 km or so when i come to a stop and turn the car off and try to start it up again it won't start up, end up letting it sit for 20 mins or so. Changed the Coolant temp sensor and reset the computer but came back only a few day's later ????
The temp gauge works of a different sender to the coolant sensor. IT has 1 wire only and changes resistance as the water heats up there by moving the needle on the gauge up the scale Check that the wire is tight on the sender unit and if so then replace the sender unit.. The difficulty in re starting the motor may be because it is over heating but you would not know this because of the faulty sender unit.
SOURCE: heat fluctuation on temp gauge
change the sending unit to the fan, if that doesnt work check for power too the fan or even a bad fan
SOURCE: car overheating
You need to check the water pump and coolant level. If coolant level is low you might have the air pocket in system. Overheating of the car can cause the damadge of head gaskette and engine block itself.
Good Luck
SOURCE: Temperature sensor problem?
There are 2 different circuit that control the cooling fans.
The engine controller turns the low speed fan circuit on to control temperature and turns on the high speed fan circuit if the engine and A/C is running.
It sounds like your low speed fan function is not working.
Find your fan 1 fuse located in the under hood fuse panel and make sure it is not blown. If OK go to next step.
Find your fan 1 relay located in the under hood fuse panel. Find another relay in the fuse panel that matches and swap the two. If the fan then works you know you have a bad relay.
If both are check good, let me know and we will go from there.
Below, I have attached the wiring diagram for your cooling system, hope it helps.
Regards,
SOURCE: cooling fan doesnt come on in my 95 pontiac grand am 3.1L se
Change the thermostat,and bleed the cooling system or air.It does not need to be hot,and there are little bleeders on the engine,one is near the water outlet,it has a nut and a screw in the middle of it open it up,and pour coolant in the radiator,and watch for air and coolant to come out of the bleeder,and when all the air seems to be gone ,close the screw.Need to hold the nut while loosening the screw,and when you tighten the screw back down.Fill the radiator,and the reservoir full.The reservoir will have a full line on it,fill it up past the mark,about a quarter of the way more.Then start the engine set the heat to floor and turn it on low fan.Let it run,to see if the fans will come on,and they need to go off to let you know the engine is cooling back down.If they do not come on,right before the engine gets to hot,before the engine starts bubbling the reservoir tank,cut the engine off,and leave it for about 25 minutes.Then look at the reservoir to see if the coolant level has gone down,if so,add more coolant to the reservoir and start the engine up again,same procedure,it should start cooling then.
SOURCE: 06 grand prix --my temp gauge is not working, the
Coolant Temperature Sensor
I would take the vehicle back to where it was serviced and try to ask them about what may have gone wrong to cause this problem.
The Intake Air Temperature sensor should also be checked.
The following is the procedure for servicing the coolant temperature sensor:
Removal & Installation
3.8L Engine
To Remove:
To Install: 
5.3L Engine
To Remove:
To Install: 
480 views
Usually answered in minutes!
×