Engine overheating have a 97 jeep grand cherokee it drives fine until the temperature gauge eases up and after a while it will go past the red line for overheating and the check gauges light comes on i have already replaced water pump and 2 thermostats. could it have something to do with the computer

I WOULD TRY CHANGING THERMOSTAT.

cooling fans not working

Did you replace the thermostat also?

If the system is loosing coolant, it has be leaking from some place, either from a connection, gasket or out of the tail pipe. When you refilled the cooling system, did you start the engine and inspect the vehicle while it was running and at operating temp?

Since you have already changed everything that you have, I can not think of anything new that might cause your Jeep to overheat. Are you going by the meter in your vehicle or doing separate temperature measurements? I had a defective temperature gauge that caused me to chase my tail till I did separate measurements.

If your "Check Gauges" light is on, the light means pretty much whay it says...CHECK GAUGES! One or more of your gauges is/are reading outside of normal operating range. You could be having an overheating problem (Temperature gauge near or in the red) You could be having a charging system problem (Battery or Amp gauge reading in the "discharge" or "low voltage" area.) You could be nearly out of fuel (Fuel gauge reading near empty) Your oil pressure could be low (OIl Pressure gauge reading very low)....You have to look at your gauges to find out what is going on that is not normal.

Hi.

Common fault is fuel pump getting damaged after engine overheating.

The pump is located in fuel tank, to know if pump is working, check fuel pressure using an hand gauge. It is available for $25 or so.

Check if there is coolant. If engine restarts check coolant level, if that goes down, then the head gasket has been damaged.

If fuel pressure is OK, check injection and distribution.

Is it really the engine which starts running, or is it the hydraulic cooling fan which makes a lot of noise due to the high coolant temperature? Since the temperature drops down rapidly when you start driving, the problem seems to be with a restricted airflow from the cooling fan. Was the radiator changed lately?
Take care in not overheating this engine, because the heads can warp (coolant leak) and/or it can start dropping a valve seat.

Calvin...... You need to treat your Jeep to a new THERMOSTAT. The Overdrive is connected to the engine coolant temperature and if the engine is n ot warmed up properly, the Overdrive will not engage. Try to get a thermostat from the Jeep dealer so you will have exactly the right one, some of the cheapoie ones will not work right. Dave in Iowa

or could be the electric fan temperature sensor by the thermostat. usualy 2 wires into a round sensor. that turns on the relay for the fan