The 2022 Lincoln Navigator delivers flagship luxury with the powerful 3.5L EcoBoost twin-turbocharged V6 engine. When your Navigator displays a P0304 code indicating a cylinder 4 misfire, understanding this sophisticated powertrain helps guide accurate diagnosis.
Understanding P0304 in the Navigator
The Navigator's 3.5L EcoBoost V6 uses twin turbochargers for impressive power and refinement. Cylinder 4 is located on the rear of the left bank of the V6. The engine control module monitors combustion events through crankshaft position analysis.
Twin-Turbo Considerations
The EcoBoost's twin-turbo setup creates high combustion pressures that accelerate spark plug wear. Direct injection technology, while efficient, can contribute to carbon buildup on intake valves over time. The boost system must maintain proper pressure for correct operation.
Diagnostic Approach
Access the cylinder 4 ignition coil on the left bank. Inspect spark plug electrode condition. Check for boost leaks in the charge piping. Verify no vacuum leaks exist in the intake system.
Resolution Process
Replace spark plugs with Ford/Motorcraft specifications. Test ignition coil output. If carbon buildup is suspected, intake valve cleaning may be warranted.