CP4 Metering Valve Bypass Kit

The Whitbread CP4 Metering Valve Bypass Kit is engineered to mitigate catastrophic fuel system failures in TDI engines equipped with the CP4 injection pump. The CP4 pump uses diesel fuel for internal lubrication, making it highly susceptible to damage from fuel contamination. When debris or metal shavings are generated, they can be circulated throughout the entire high-pressure fuel system, leading to the failure of the pump, injectors, fuel rails, and sensors. This bypass kit acts as a crucial preventative measure by isolating the CP4's lubrication circuit from the injection system. It ensures that if the CP4 pump fails due to contamination, the resulting metal shavings are contained and do not compromise the integrity of other expensive fuel system components. This significantly reduces the scope and cost of repairs, often limiting the necessary replacements to the CP4 pump itself and the return filter. It is compatible with both stock and previously tuned vehicles. However, users who have a tune and are experiencing low rail pressure codes should consult additional information provided by the manufacturer. It is also compatible with other engine codes including CPNB, CNRA, CNRB, CATA, and CKRA. The kit includes the necessary components to reroute the fuel flow, protecting your investment in the TDI's sophisticated fuel system.