TDI CP4 Metering Valve Bypass Kit

As with any of our machined products, the block is 100% CNC cut in house here in Johannesburg Michigan.  For those that don’t know, the CP4 is the fuel injection pump that is installed on the second generation 3.0 TDIs and 2.0L TDIs. This injection pump uses only its fuel supply for lubrication, diesel first flows into the bottom end of the pump to lubricate the camshaft, rollers, lifters, and bushings before the diesel flows up to the metering valve to be used for injection. Unfortunately, the CP4 can be rather sensitive to fuel quality. If contamination occurs and one of the rollers gets stuck, the pump will start making metal shavings in the bottom end. As the CP4 continues to pump, it is now pumping diesel contaminated with metal shavings through the metering valve and into the rest of the injection system. When this failure occurs the CP4, injectors, fuel rails, rail pressure sensor, pressure control valve, high pressure lines, injector return lines, tank lines, and fuel module wi