Chrysler Concorde 1993-1997 Fuel System Specifications

The 1993-1997 Chrysler Concorde 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 may damage the engine or 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 rear seat cushion to access the fuel pump assembly. Disconnect electrical connectors and fuel lines, then unscrew the retaining ring. Carefully remove the old pump and install the new one, ensuring all seals are properly seated. Reassemble in reverse order and test for leaks.

Poor fuel efficiency can result from clogged fuel injectors, a dirty air filter, or a malfunctioning oxygen sensor. Check and replace the air filter if necessary. Use a fuel injector cleaner or have the injectors professionally cleaned. Inspect the oxygen sensor and replace it if faulty. Ensure proper tire pressure and alignment for optimal performance.

To optimize fuel performance, use high-quality gasoline and add a fuel system cleaner periodically. Regularly replace the air filter and spark plugs. Ensure the engine is properly tuned and the oxygen sensor is functioning. Drive smoothly, avoiding rapid acceleration and heavy braking. Maintain proper tire pressure and reduce excess weight in the vehicle.