![]() ![]() ![]() ![]() The pump will become hotter due to excessive RPM's from the chips programming.īosch Vp37 Diesel Pump Repair ManualBosch VP Diesel Pumps - EDC (electronic control unit) safe removal from your bosch dieselpump ready to send to us for inspection and repair - save 100's. ![]() Performance chip add on's affect the cooling rate of the pump. In the VP44 pump the fuel is used to cool and lubricate the pump, and the tolerances between the head and the rotor is very fine. If the wires are cut the pump is no longer warrantable, and any repairs that need to be made to the injection pump will be the buyers responsibility. The more pressure created by the internal transfer pump and timing solenoid valve, the more the timing will advance therefore, timing range capability is increased at higher rpm's.Performance chip & add on disclaimer - Tampering with the pumps wires can cause premature pump failure. Based on the inputs from the fuel pump control module (FPCM), the timing solenoid valve pulses to vary the pressure to move the timing piston, which results in the cam ring moving to the desired position to achieve the commanded timing. As pump speed increases, the fuel pressure to the timing piston assembly also increases. ![]()
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