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95 roadmaster temp gauge goes to hot while starting engine

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Posted on Jan 02, 2017

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SOURCE: 2005 chevy equinox temp gauge showing hot fan

check the coolant temp sensor

Posted on Mar 22, 2009

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1 Answer

95 caprice started smoking yesterday.. It was a lot of smoke but the temp gauge didn't say that the engine was running hot.. What could this be and why didn't my temp gauge show that it was hot


Have you lost cooling fluid, or oil? If fluid is non existant, the Temp gague may not have enough information, or it hasn't been operating for some time, especially if there is no cooling fluid.

May 05, 2015 | Cars & Trucks

1 Answer

The temperature gauge goes up when car starts to HOT like its out of calibration. the engine is not overheating


check that the wire to the temp sender unit has not fallen off and is shorting out on the head/block. The power comes from the ignition switch through the gauge down to the sender unit and because the sender is a temperature controlled resistance unit the voltage is very low and so the gauge reads cold . as the temperature heats up , the resistance is decreased and so the voltage is increased though the gauge and the needle reads higher.. Hench if the gauge goes directly to hot on start up the wire is shorting out or the sender unit is faulty.

Mar 09, 2014 | Acura CL Cars & Trucks

1 Answer

My temp gauge quit working and i replaced sender and gauge. it's got to be a short. but where to start maybe someone else has had the same problem


95 yj (quite means, hot , low or mid?,) just a clue.?
4.0L? all fuses good,?
the FSM covers this , here is the outline (all cars this era)

1: IR pyro gun pointed to thermotat housing near 180f 170f min.
2: ok engine really IS hot. then we ground the gauge feed, meter,
pegs, meter good , I use a light bulb from ground to guage to
limit current (im nice to my meters)
3: i then find my temp sender, the one with 1 pin.
pull the connector with a hot engine
this is a passive NTC thermistor and is not the ECT with 2 pins.
its just for the gauge.
the 91 sender is different from a 95 so dont mix years,!!
92-95 are matched.

hot engine, 180F or more...
pull off the single wire. to the sender.
connect DMM set to OHMS (yes, omega symbol i s that)
select 200 or 2000 range, id use 2000, , if an auto ranging meter
let it range and read the LCD markers, it tells you what range it landed red to pin, the black to engine block. (rear top sender on 4.0L)

its not the sender bad, all in 5min work. no guessing at all

so if its good, the wires are bad. twinxed them.

the only hard part is finding good ohms charts that match your year.
all else is caveman simple 1 wire, gauge and sender.

i see many folks online mixing wrong clusters in jeeps
and wondering why the right sender dont work.
so did you cluster temp ever work right, this year, this decade?
ohms law , never lies, but wrong parts do.... every time.


the sender is NTC, higher ohms cold, , lower hot !

i could not FIND the sender spec. at all.
1million hits for ETC, zero for gauge.

my guess is sender will read high ohms cold , 1000 or more. more cold more ohms... (resistance)
then drop in ohms as engine warms might drop to as low a 80 ohms.
but will drop , gauge wire (it only has 1) disconnected.





Dec 31, 2013 | 1995 Jeep Wrangler

1 Answer

1997 escort temp gauge pulled wire off sending unit temp gauge went to coldso


please state what engine ,diesel endura /petrol or a american big engine as in the europeon scorpio

Nov 16, 2013 | 1999 Ford Taurus

1 Answer

My 1999 Chevy Malibu runs hot? It started when it overheated. We changed the thermostat, then water pump, then temp sensor gauge and the temp gauge goes high but only when the heater stops blowing hot...


Air pockets will make the guage do that, and also cause your heat to come and go. Also, a poor radiator, as in rotting, or plugged up, will cause high temperature issues.

Sep 20, 2011 | 1999 Chevrolet Malibu

1 Answer

1996 buick roadmaster. temp gauge goes almost all the way up to hot after driving about 10 miles. i'm thinking thermostat?


I assume you have a 3.8L V6. Probably thermostat, but first take a look in the radiator to make sure it is full. Not just the plastic overflow tank, take the radiator cap off and look. Make sure the engine is cold though. The radiator should be full to the top. The way the system works is that as you drive your car, the water heats up and expands and the check valve in the radiator cap will let the overflow go into the plastic tank when the pressure get over a set amount usually 14-17 lbs. When you shut off your engine, the water will be slowly sucked back into the radiator as the engine cools. if the radiator cap is bad, it may not let the water get sucked back into the radiator and the engine will run hot, you will get air and steam bubbles in the engine, the thermostat will work as long as it has water running by it but if a slug of steam goes by it, it will close. "Burping" that engine is a pain but just keep the overflow tank full and check it every time you *start* the car. The air will work itself out.

Nov 18, 2010 | 1996 Buick Roadmaster

1 Answer

Tempreture gauge drops to cold and car stops


Sounds like faulty engine temp sensor. When it drops to cold, the engine control unit picks this up and alters the fuel mixture accordingly. The ECU will be making it a very rich fuel mixture for cold starting, hence very poor running when engine is hot.

TL

Jan 12, 2009 | 2006 Renault 181

1 Answer

Location of the temp sensor on a 95 roadmaster?


Location of the temp sensor on a 95 century

Jul 28, 2008 | 1995 Buick Roadmaster

2 Answers

Dash Temp Gauge reading extremely hot


You need to pressure test the cooling system. If it holds pressure, I would look at replacing the water temp. sensor. If it doesn't hold pressure, you have a coolant leak going on. If you don't see it dripping on the ground or inside the car, I would be suspecting head gasket problem.

Jun 09, 2008 | 1995 Ford Taurus

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