Temp Gauge Issue, Sensor possibly?

wallgood358 · Post by **wallgood358** » Sat Jan 13, 2007 11:28 pm

oday i was driving my 92 Legacy and hopped on the freeway. Shorty after hitting abour 70, the temo gauge started bouncing between operating temp and all the way cold. Just drop and boucnce back. When i got off the freeway, it fell all the way and didnt move. I stopped for gas, started the car and the gauge didnt move. About 5 minutes into driving again, it started twitching and bounced up about a quarter of the way up the gauge and did this repeatedly before settling at operating temp and stayed there for my drive across town. Then at a stop light it started doing it again. I am very confused and am wondering what i need to check to figure out the cause of this

wallgood358 · Post by **wallgood358** » Tue Jan 16, 2007 7:39 am

Now it isnt working at all? Any help?

biggreen96 · Post by **biggreen96** » Wed Jan 17, 2007 10:02 pm

thats really odd, maybe the gauge is toast now. My advice, get an autometer water temp gauge. I never trusted the stocker.

wallgood358 · Post by **wallgood358** » Thu Jan 18, 2007 4:22 am

Well i bought a new sensor. It was only $35 and plan to put it in this weekend, but am thinking of a more accurate one to install when i put in my Air/fuel and boost gauges

biggreen96 · Post by **biggreen96** » Thu Jan 18, 2007 4:44 am

there should be a way to test to see if the sensor is still working, its probably in the FSM's which can be downloaded. Id do that first, since it could be wiring or the gauge too.

Psychoreo · Post by **Psychoreo** » Thu Jan 18, 2007 4:52 am

that and the sensor doesn't send the info to the gague. there's a 1 wire sending unit right next to the sensor that sends the reading to the gague.

subytech · Post by **subytech** » Thu Jan 18, 2007 3:56 pm

To make your gauge jump around like that makes me think that you had a week connection or some kind of wireing problem somewhere that finally broke. These types of sending units are usually very reliable so i'm leaning away from the sender.

Jody Olson · Post by **Jody Olson** » Wed Jan 24, 2007 5:19 pm

wallgood358 wrote:oday i was driving my 92 Legacy and hopped on the freeway. Shorty after hitting abour 70, the temo gauge started bouncing between operating temp and all the way cold. Just drop and boucnce back. When i got off the freeway, it fell all the way and didnt move. I stopped for gas, started the car and the gauge didnt move. About 5 minutes into driving again, it started twitching and bounced up about a quarter of the way up the gauge and did this repeatedly before settling at operating temp and stayed there for my drive across town. Then at a stop light it started doing it again. I am very confused and am wondering what i need to check to figure out the cause of this

Had the exact problem on a 93 I just picked up. Changed the temp sensor ($23) and it is back to FMC. Before I changed the sensor my temp guage was acting like a boost guage most of the time, up while on the gas, down when at idle. Some times it would work normal, sometimes not at all.

wallgood358 · Post by **wallgood358** » Sat Feb 03, 2007 11:58 pm

Is the temp sending unit the 1 wire sensor right below the alternator? And is there a way to test the sensor with a volt meter to see if it is working?

Jody Olson · Post by **Jody Olson** » Wed Feb 28, 2007 7:58 pm

No, it is on the back side of the engine, drivers side. brown colored plug on my car.

Psychoreo · Post by **Psychoreo** » Wed Feb 28, 2007 8:46 pm

wallgood358 wrote:Is the temp sending unit the 1 wire sensor right below the alternator? And is there a way to test the sensor with a volt meter to see if it is working?

That's the crank sensor. You need that.

Post by **Legacy777** » Fri Mar 02, 2007 6:33 pm

Psychoreo wrote:
wallgood358 wrote:Is the temp sending unit the 1 wire sensor right below the alternator? And is there a way to test the sensor with a volt meter to see if it is working?
That's the crank sensor. You need that.

No....that's the oil pressure sensor.

The crank sensor is a two wire sensor.

Psychoreo · Post by **Psychoreo** » Sun Mar 04, 2007 10:25 pm

ya, sorry, brain wasn't working.

georryan · Post by **georryan** » Sat Mar 17, 2007 1:37 am

Have you changed your coolant temp sensor yet? Did it fix the problem?

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Temp Gauge Issue, Sensor possibly?

Temp Gauge Issue, Sensor possibly?

Re: Temp Gauge Issue, Sensor possibly?