Some Ford F-350 Super Duty owners report experiencing engine shutdowns at high speeds, such as 70 mph, potentially due to issues with the high pressure fuel system. These shutdowns may occur if there is a lack of fuel reaching the engine, which is crucial for its proper functioning. Additionally, some owners have noted that a malfunctioning high pressure fuel pump can lead to low fuel pressure, preventing the engine from starting immediately. Contamination in the high pressure fuel system, such as the presence of metal flakes, may require the replacement of components like injectors, the high pressure pump, and fuel lines to restore functionality. Furthermore, a faulty Injector Control Pressure (ICP) sensor has been reported to cause rough engine performance, irregular throttle response, and subsequent shutdowns at high speeds.
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