How often have you had a Vauxhall Astra, Corsa or Combo, with the 1.7 16V diesel Isuzu engine, come in to the garage with issues such as the vehicle running poorly, failing to start or showing a fault code of P0251 – injection pump metering control? ACtronics investigates.
Although these faults could relate to many issues including the spill valve on an injection pump, spill valve relay or faults within the main engine ECU, it is more often than not the fuel pump ECU that is at fault, which on these vehicles is the Delphi Delco EDU.
This small EDU, is situated on the rear of the engine and will have a single plug on the top of the unit and is an extremely common unit to fail.
When these units do fail, it is usually caused by a design flaw within the unit itself. The design flaw is that the spill valve inside the pump has such a high load solenoid it would usually destroy the driver system within the EDU through sheer current draw.
It is very common to have these come in for remanufacture after poor third party work, as it is believed to be an easy fix, however, even though it’s a small unit, the PCB is just like any other ECU.
To be able to do a full remanufacture of this unit, a lot of work is needed inside to get the unit remanufactured to the high level we operate to, which includes replacing and re-soldering all capacitors and re-soldering all commonly known joints and connector pins.
We have also designed a bespoke modification for this unit, to rectify one of the common known faults with shorting out on the PCB.
ACtronics offer a couple of different options for its customers. A full remanufacture of the original unit, meaning all commonly known components that go faulty will be remanufactured as well, or it offers a bespoke new unit designed from scratch.
Due to the amount of these we have received, we have designed our own bespoke unit, which cools a lot quicker and is further designed to last longer than its original counterparts.
