The 6.4L Power Stroke (Ford, 2008–2010) moved to a twin-turbo, common-rail piezo injection system. Its injectors are a known wear item, and a failing injector can over-fuel a cylinder — which on this engine is worth catching early.

Common symptoms

• Rough idle, miss, or knock.
• White or black smoke (white from incomplete combustion, black from over-fueling).
• Hard cold start.
• Fuel in the engine oil / rising oil level — a serious warning sign on the 6.4.
• Loss of power and poor economy.

How to diagnose it

1. Scan for codes and review cylinder contribution data to isolate the cylinder(s).
2. Check oil level and smell — fuel dilution points to a leaking injector and should be addressed promptly.
3. Confirm fuel-rail pressure against spec.
4. Rule out the basics — fuel filters (the 6.4 has two), fuel supply, and battery health.

Repair notes

6.4 injectors are commonly serviced as a set. Because fuel dilution of the oil can lead to bigger engine damage, don't defer a confirmed leaking injector.

Before you order: verify the exact injector by OEM cross-reference for your truck.

Browse options on our 6.4 Power Stroke collection and fuel injector catalog, or contact us for help confirming fitment.