couple of questions

[wingtip80]

I just resently bought a 94 mtx with 97,000 miles on it. And my acc only works on high fan? do I just need a new one. Also my temp gauge goes back and forth. Any help would be appriciated.

thanks
Dale

 

[Ishodu]

The fan working on high only points to the blower control module, its just below the glove compartment. If you search I am sure you can find a pic of it. As for the temp gauge going up and down it could be air in the system or a faulty thermostat. Please explain more symptoms and the causes of this.

 

[wingtip80]

The temp stays right on the line under cold if the car runs and I don't drive it it will go up to about half way but will not stay. Also no matter what I set the temp to it's always the same temp coming out of the vents..

 

[rangerj]

The temperature gauge is controlled by the temperature sending unit. This is a one wire unit that looks like a small spark plug, not to be confused with the coolant temperature sensor. Check the connection and make sure it is getting good contact. Next check your hose connections. Make sure they are tight but do not over tighten them. There is a torque specification for hose clamps, but I do not know anyone who does this.

When the car cools down a vacuum is created and any loose hose will allow air to be sucked in and this will cause the gauge to fluctuate. Check the hose from the overflow bottle to the radiator. If it is cracked or loose it will also allow air to be sucked in as will a faulty radiator cap. Then check to make sure your fan is comming on when the engine temperature rises to the prescribed limit. If the radiator cooling fan is not working it also will cause the temperature to rise when you are stopped, then go back down when you are moving.

 

[shoebilly]

I just resently bought a 94 mtx with 97,000 miles on it. And my acc only works on high fan? do I just need a new one. Also my temp gauge goes back and forth. Any help would be appriciated.

thanks
Dale

Low Coolant level. Air pocket.