i recently just bought another em1 (99 si) well everything on the car is great minus the fact that the temp guage doesnt move, or atleast 95% of the time and some times ill look down and its about a 1/4 of the way up doesnt even make it to the 1/2 way point were it should be.....im in the process of getting another guage cluster outta a buddies car to pop in and just see if its the cluster, but is there any thing else i should check or swap out that may fix my problem if the guage cluster isnt the issue? has anyone else ran into this problem and if soo what are some of yalls suggestions? all help is greatly appreciated, thanks

 

Could be the T-Stat stuck open never allowing the engine to get hot. After idling for 10 mins or so are the Radiator Hoses hot? Could also be the temp gauge connector getting a bad connection. Look under the Distributor and you will see a one wire connector going to a sensor in the Cylinder Head, make sure it is good and tight and getting a good connection.

 

i will check the hoses when i get out of work, and ill also check that connection out, i wasnt sure if there was a temp sensor or something else other than the t-stat

 

If you have the money I would suggest purchasing an after market coolant temp sensor as it will give you quite a bit more information and will be much more accurate.

 

thats a good idea also, im honestly jsut trying to get it to function the way it should and i dont want the extra guage but i may just plug it up to see what its reading

 

Sounds like a stuck T Stat. Good luck with the fix!

 

Pull the wire off the temp sensor and ground it then check where the needle is on the cluster if it goes to the top the cluster is ok.
Like was said before make sure the wire has a good connection on the sensor.Check t.stat and if that is good replace the sensor,its cheaper than a cluster.

 

+1. ground the sensor. if it goes to full hot its good.

 

changed my thermostat last night, fixed the problem right away.....thanks guys