P0304 Diagnostic Trouble Code Discussion for April 2026
Cylinder 4 Misfire Detected
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| Help Request | Posted | |
| 2013 Toyota Prius Three 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: JTDKN3DU9D P0304: Misfire cyl 4. This car came in with a misfire and a the terrible Prius transmission rattle. Scanner showed #3 misfire constant and some misfire on #4. Noticed bare wires at connector for #3 injector and fuel leakage at all injectors. Replaced all injectors. Now when eng... |
April 01, 2026 | |
| 2013 Toyota Prius Three 1.8L Poor Idle Quality, Misfire, MIL Lamp on VIN: JTDKN3DU9D P0304: Misfire cyl 4. This car came in with a misfire and a the terrible Prius transmission rattle. Scanner showed #3 misfire constant and some misfire on #4. Noticed bare wires at connector for #3 injector and fuel leakage at all injectors. Replaced all injectors. Now when eng... |
April 02, 2026 | |
| 2017 Mercedes-Benz GLE63 AMG S 5.5L Hesitation, Misfire, MIL Lamp on VIN: 4JGED7FB6H P0304: Misfire cylinder 4. Customer came in for a misfire on number 4 cylinder. Replaced original spark plugs. Still had a misfire so we swapped #4 and #1 coils with #4 still misfiring. Swapped #4 injector and coded it to the car. Still misfire so we did compresson test and bore sco... |
April 14, 2026 |
