Jeep Cherokee 1997-2001 Fuel System Specifications

The 1997-2001 Jeep Cherokee is compatible with regular unleaded gasoline with an octane rating of 87 or higher. Using higher octane fuel is not required but may improve performance in certain conditions. Avoid using diesel or ethanol blends above 10% (E10) as they can damage the engine and fuel system components.

Regular maintenance for the fuel system includes inspecting and replacing the fuel filter every 30,000 miles, checking fuel lines for leaks or wear, and ensuring the fuel injectors are clean. Use fuel system cleaners periodically to prevent buildup. Additionally, monitor the fuel pump for unusual noises or performance issues, as it may need replacement after 100,000 miles.

To replace the fuel pump, first, disconnect the battery and relieve fuel system pressure. Remove the fuel tank by disconnecting hoses, straps, and electrical connections. Once the tank is lowered, remove the fuel pump assembly from the tank. Install the new pump, ensuring all seals and connections are secure. Reattach the tank, reconnect hoses and wiring, and test the system for leaks.

Poor fuel economy or stalling may indicate a clogged fuel filter, failing fuel pump, or dirty fuel injectors. Start by inspecting and replacing the fuel filter. Check the fuel pump pressure using a gauge; it should read 49-55 psi. Clean or replace fuel injectors if necessary. Also, inspect the oxygen sensors and air filter, as they can impact fuel efficiency.

To optimize fuel performance, use high-quality gasoline and add fuel system cleaners periodically. Ensure the air filter is clean and replace it if dirty. Regularly check tire pressure and alignment to reduce rolling resistance. Avoid excessive idling and aggressive driving. Additionally, maintain the engine and fuel system components, such as spark plugs and oxygen sensors, to ensure efficient combustion.