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2002 Ford F150 4.6L V8 PO300 Code - Multiple Cylinder Misfire Diagnosis

Model: 2002 ford f150 4.6 v8 Fault Code: P0300 Posted: 2009-10-04 18:49

I'm experiencing a persistent PO300 code indicating multiple cylinder misfires on my 2002 Ford F150 with a 4.6L V8 engine. This issue appeared suddenly after regular maintenance and no prior symptoms or trouble codes. The truck has approximately 106,000 miles and has been well cared for. I'm seeking reliable troubleshooting steps to identify the root cause of this misfire. Any insights or common causes specific to Ford F150s with this engine would be greatly appreciated. Thanks, Mike.

Related fault codes
P0300
Comments (4)
Anonymous 2009-10-04 19:48

Does your truck exhibit misfiring symptoms? Can you identify which cylinder is contributing the most to the misfire? Have you reviewed common causes of PO300 codes on Ford F15或 vehicles using the search function on this forum?

Anonymous 2009-10-05 13:44

I've recently replaced the spark plugs, fuel filter, PVC valve, and air filter. The issue persists—has anyone tried injector cleaning or a diagnostic scan to confirm cylinder-specific misfires?

Anonymous 2009-10-05 17:01

Ignition system issues are common on 2002 Ford F150s with the 4.6L V8 engine—could a faulty coil pack or spark plug wiring be contributing to the PO300 code?

Anonymous 2009-10-06 08:11

I suspect the problem lies with the number 2 cylinder coil pack—this has been a known issue in some 2002 F150 models with this engine.