* Throttle Position Sensor (TPS): Located on the throttle body. This tells the computer the throttle's position.
* Mass Air Flow Sensor (MAF) or Air Flow Meter (AFM): Located in the intake air duct. This measures the amount of air entering the engine. (Which one it has depends on the engine type. A 4.0L likely has an AFM, while a V8 likely has an MAF).
* Crankshaft Position Sensor (CKP): Located near the crankshaft. It tells the computer the engine's rotational position.
* Cam Position Sensor (CMP): Located near the camshaft (precise location varies by engine type). This sensor signals the camshaft's position.
* Oxygen Sensor(s) (O2): Usually located in the exhaust manifold(s). These sensors measure the oxygen content in the exhaust to help the computer adjust the air/fuel mixture for optimal combustion and emissions.
* Fuel Pressure Regulator: This is not strictly a sensor but regulates fuel pressure and is an important part of the fuel injection system. Its location varies slightly based on engine type.
* MAP (Manifold Absolute Pressure) Sensor: This measures the pressure in the intake manifold, helping the computer determine the engine load.
To find a specific sensor, you'll need to:
1. Identify your engine: (e.g., 4.0L inline-6, 5.2L V8). This is crucial as the sensor locations vary by engine.
2. Consult a repair manual: A Haynes or Chilton repair manual specific to your 1994 Jeep Grand Cherokee and engine type will have diagrams showing the location of each sensor. This is the best resource for accurate information.
3. Use an online parts diagram: Many online auto parts websites (like AutoZone, Advance Auto Parts, etc.) allow you to look up diagrams for your specific vehicle. Enter your Jeep's year, make, model, and engine.
Simply searching for "fuel injection sensor" won't give you a specific location because it's a system, not a single part.
