There are a few potential causes for why a 1995 Jeep Wrangler might stall in low idle, some of which may include:
Bad Throttle Position Sensor (TPS): The TPS informs the engine control unit (ECU) of the position of the throttle, and can result in stalling if the sensor is faulty.
Dirty or Clogged Fuel Injectors: If the injectors are blocked, the fuel will not be able to reach the engine, causing the vehicle to stall. To fix this, you should have the injectors cleaned.
Vacuum Leak: Air that bypasses the throttle plate will lean out the fuel mixture, causing the vehicle to stall. Inspect all hoses and fittings for vacuum leaks.
Faulty Oxygen Sensor: The oxygen sensor monitors the oxygen content in the exhaust system and communicates this information back to the ECU, allowing the proper fuel mixture to be maintained. If the oxygen sensor is faulty, it could be giving incorrect readings to the computer, causing the engine to run poorly or stall.
Idle Air Control (IAC) Valve: This valve regulates the amount of air that bypasses the throttle plate, and can cause stalling if it is faulty.
Faulty Engine Coolant Temperature Sensor (ECT): The ECT communicates the engine's temperature to the ECU, which uses this information to adjust the fuel/air mixture. If the ECT is faulty, it could provide incorrect information, leading to stalling.
