Jeep Tj Normal Operating Temp. Cooling capacity certainly does make a difference. When The jeep is warming to its operating temp it rides really rough and lunges until it warms up.

Whats the average running temp. for the 4.0? - Jeep ...
Whats the average running temp. for the 4.0? - Jeep ... (Rena Barber)
The powertrain control module (PCM) tracks how long it takes for the engine of your Jeep to reach and maintain the correct operating temperature. The temp the engine will run at depends on the temperature of the thermostat in the engine. Is this normal or is the temp running high to cause concern?

When the correct engine operating temperature is reached, the powertrain control module orders the fuel system to enter "closed loop.

I get some heat from vents when this happens, but not real hot.

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TJ Normal Operating Temp

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Cooling capacity certainly does make a difference. You may wanna take it to the dealer and get it checked. TJ General Discussion Forum. normal operating temp.