HELLO I HAVE 1995 GRAND PRIX WITH THE 3.1 MOTOR. MY PROBLEM IS IM NOT GETTING NO HEAT. THE TEMP GAGE GOES TO NORMAL WHEN ITS IDELING WHEN DRIVING GET HOT THEN WHEN I PUSH ON BRAKE OR COME TO A STOP THE GAGE SHOWS HOT AAGAIN , HELP!!!

Engine Temperature Issue - Please Help! - Mazda 6 Forums : Mazda 6 ...

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Sep 12, 2011 - Join Date: Mar 2006 ... to the gauge) and then after being shut off for 5 minutes, show COLD. ... I'll also confirm, with my AP, that my ECT is around 200 like it normally is. .... VSS, and ECT signals and calculate radiator's heat the radiation ... I noticed my engine temp needle was dipping down and then came ... CEL - Throwing code P0126 (Insufficient Coolant Temperature ...
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Temperature gauge going up and down - CarGurus

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CarGurusAug 20, 2014 - Also as my temperature gage rises but car does not overheat. ... tempneedle gets up towards the red mark while you're driving, then yes, ... i have a 2006Pontiac Grand prix and my temp. goes up to the ... crzgrl637 answered 6 months ago ...the cooling fans won't kick on then you will see gauge over heat.

Car Engine Overheating - Causes and Symptoms of Over ...

see if the fan is working should come on with the ac on

remove thermostsat,drill 1/8 hole close to edge,to by-pass steam,common problem....jack-up the front of car toallow any air to purge from system,should be bleeder valve...bolt with a nut...loosen it remove air until antifreeze runs out,retighten bleeder nut,,put car back down....should fix ya

I think you should start thinking it might not be the gage itself but >Problem with the wires in the circuit itself Also warm car up take a thermometer & check coolant tempature cross referance with temp gauge in the car

you may have a bad temp light sensor in the motor or gauge.170 is not hot at all for these cars.

The initial problem points to the radiator fan(s) not running at any road speed. Check the fan(s) for noise-free turning by hand. Check fan fuse and relay (swap with similar relay). Turn on the air conditioner which should immediately turn on the fan(s). Overheating while driving could very well be the thermostat--you will need to drain the cooling system before replacing the unit. Blow out the radiator core with compressed air from the engine side to remove bugs and other debris first. Hope this helps!

At around 200^ or little less195^ while driving, ac on idling in traffic will read hotter but out of red, note should change thermo stat if over heated I hope I was Helpfull

change the sending unit to the fan, if that doesnt work check for power too the fan or even a bad fan

Go the Cheaper Route First and Go back to the Parts store and ask for a Cooler Thermostat. Try that and let me know what you have got.

try running it to running temp and try to check the heater core hoses. if one is hotter then other may have pluged up heater core.