Technical
Technical notes on Bosch VP30 and VP44 injection pumps, PSG5 control units, diagnostics and bench calibration.

A VP30 or VP44 pump from another Ford: immobiliser lock and how to resolve it
A VP30 or VP44 pump taken from another Ford is often locked by the immobiliser: the engine starts and cuts out immediately.…

Repair or replacement of the PSG5 control unit: technical criteria
Most PSG5 control units on VP30 and VP44 pumps have been in service for more than twenty years. Criteria for choosing between…

Ford VP30 and VP44: the immobiliser warning light and a locked pump control unit
On Ford diesels with a VP30 or VP44 pump, the pump control unit is paired with the immobiliser. How to read the…

OEM-equivalent, not proprietary: how HC-PSG5 fits your EPS 815 and calibration workflow
Donor PSG5 units are scarce and many cores are manipulated. HC-PSG5 is a brand-new, OEM-equivalent control unit that adjusts exactly like the…

Product details: HC-PSG5
An OEM-equivalent replacement control unit for Bosch VP30/VP44 (PSG5) pumps — EPS 815-compatible, with dFi adjusted exactly as on the original.