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P0303 Diagnostic Trouble Code Discussion for November 2019

Cylinder 3 Misfire Detected

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Trouble Ticket Help Requests for DTC P0303
Help Request Posted
2009 Porsche 911 Carrera 4 3.6L Poor Idle Quality, Misfire, MIL Lamp on VIN: WP0AA29949
P0303: Cylinder 3 Misfire. Car came in with P0303. On cold start, it runs noticeably rough with misfires logging on cylinder 3. I'm using autologic bluebox. Took it around the block and it hesitates bad and logs many faults on cylinder 3 until the cylinder is disabled. So i warm...
November 05, 2019
2006 Ford F-150 XLT 5.4L Misfire VIN: 1FTPW14V36
P0303: misfire 3 cylinder. Using ford ids scanner. Vehicle runs smooth cold, after warm up it has misfires at idle only on #1 #2 #3 #4. Switched o2 sensors side to side and no change. Checked phaser timing. Reprogramed pcm and no change.checked powers and grounds to coils and inject...
November 21, 2019