Its not the fan..could it be the temp sending sensor

[sho_me92]

well my dads 94 atx has a problem the temp will go all the way up close to the line by the red mark iv never seen one go up that far ..i replaced the thermastat a few weeks ago .it also has a brand new water pump. if anyone could tell me what is causeing it to heat up would be great

 

[NotSoSlowSHO]

Turn the defroster on.

That should kick the fans on, no matter if the ECT is dead.

If that still doesnt do it, you more than likely blew the relay for the fans.

 

[Rockledge]

Does the fan turn on or not? Like Kenny says, turn on the defrost (or air conditioning) which will engage the A/C compressor, causing the PCM to turn on the cooling fan. If the fan does not come on, then you either have a problem in the fan circuit (CCRM?) or the fan motor is shot (although maybe there are two fans on your dad's SHO?). If the fan does come on with the A/C compressor engaged, then there's a pretty good chance it's a bad ECT (or ECT circuit).

 

[sho_me92]

ECT= electronic coolent temp? is that right

 

[naval-avi8or]

ECT= electronic coolent temp? is that right

94 ATX will have two fans unless someone in has replaced with a single fan unit from a GEN I.

Turn the AC on MAX to force the fans to come on. Also just cause you see the temp gage reading abnormal doesn't mean the car is actually running hot. The temp gage is ran by its own sending unit lacated to the left of the thermostat. The fans are operated by the PCM via the CCRM (IRCM) and recieve their tem from the sending unit located to the right of the thermo stat.

If you just changed the themostat and have air in the system it can cause erratic temp readings and fluctuations on the gage until all the trapped air burps out.

 

[PhysicsSHO]

If you've verified that the fan works, you may want to check whether the temperature is really as high as it looks. You can replace the temperature sender for the dashboard gauge, or pull the old one and test its resistance in boiling water. A search of the forum should turn up a resistance chart. You can also test whether the dashboard gauge is correct by supplying a certain test resistance and seeing if the needle goes to H or C.

-Alex