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1999 jeep Cherokee sport idle unless warm could it be the intake temperature sensor?

It could be the intake temperature sensor, but there are several other possibilities as well. Some other parts to consider checking include:

- Idle air control valve

- Vacuum leaks

- Fuel pressure

- Throttle position sensor

- Coolant temperature sensor

- Oxygen sensor

- MAP sensor

- PCM (powertrain control module)

To identify the exact cause of the problem, it is best to have your vehicle inspected by a qualified mechanic.