I have changed the plugs, plug wires, coil pack (twice) fuel injector (twice). Possible causes of a p0304 code When the diagnostic trouble code p0304 appears on a ford vehicle, it indicates that a misfire has been detected in cylinder 4 of the engine
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Since p0304 is indicating a misfire in cylinder 4, it's always a good idea to test that misfiring cylinder with a good coil pack
Repair information for p0304 ford code
Learn what cylinder 4 misfire detected means, location and how to repair. A p0304 diagnostic code indicates that cylinder #4 is misfiring Learn possible causes, symptoms, and troubleshooting tips for p0304. How to fix a ford p0304 code
⦁ bad spark plug or spark plug wire ⦁ bad. A p0304 code means a cylinder 4 misfire, typically due to issues with ignition, fuel delivery, or engine compression Fixing it involves replacing damaged.
