VP30 must not remove front pulley from pump without locking pump shaft at TDC. Smaller profile core pump, with cast assembly block bolted to the back of the pump and internals are sprung loaded, centre shaft impossible to turn by hand. Fuel spooling Solenoid between injector pipes is fixed with screw in collar.
VP44 Must not remove front pulley from pump without locking pump shaft at TDC. Larger profile core pump, with insert type head rotor to the rear of the pump. Fuel spooling solenoid is fixed by a tri-plate fixing with 3 bolts. The spooling solenoid is O-ring sealed and usually becomes damaged if forced removal.
PSG16-GM/Saab only, CANBus network hybrid engine ecu, unit has 2-plugs and is very common for multiple issues. Zafira psg16 pumps are highly unlikely to be repairable, also fitted to Frontera, and Vectra. Astra and Saab 93 psg16 pumps very occasionally suffer a critical failure, in this instance, we can sometimes effect a repair.
We no longer provide a service to repair PSG16 modules