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2.0 DLH Vauxhall Diesel Pump

I am working on my Vaxhall Astra Sporting Van which recently cut out. A check of the diag codes by dealer suggested that the diesel pump was shot.

Ive checked out the pump and there seems to be little pressure in the HP side. However checking the connector I can see Can bus signals getting to the pump.

Since these pumps are a bob or two I was going to replace it with another from a scrappy. However It was suggested to me that the ECU might need replacing at the same time since the two are coded together via the CANBUS. Another person suggested that the ECU can be reset after fitting the new pump at the dealer.

Does anyone know the best route in this case ?

I suspect the HP solenoid valve in the pump is shot and hence why no HP output. One thought was to check the solenoid valve is been commanded by the control unit with a scope if so then the control unit is OK and perhaps swap this over on a replacement pump so the ECU sees the same control unit.

ideas ?

Reply to
Wotbox
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The new pump can indeed be reprogrammed to the old ECU.

How have you been testin the HP output side of the injection pump? I suggest it may be worth taking the pump to a Bosch diesel injection specialist for diagnosis, as I have not known many of these pumps to go wrong.

BTW, the engine type in your van is either DTL or DTH. The DTH has an intercooler, whereas the DTL does not.

HTH

Anthony Remove eight from email to reply.

Reply to
Anthony Britt

Right firstly, yes the ECU and pump do need to be coded together, this can be done by a dealer with the GM Tech2 tool. Or else you will need the donor vehicles ECU as well as pump, but then you would need either the matching ignition key to disable the immobilizer or have the old key coded to the new ECU. This is also done with the tech2.

This is realistically the only way to sort the problem.

Tim..

Reply to
Tim (Remove NOSPAM. Registry corupted, reformated HD and l

Thanks for the info. It is without an intercooler.

I have a list of agents to sevice the VP 44 pump so I may go down that route. Looks like a fun job to get the pump out.

Info Ive looked up on the web seems to suggest that this particular pump is actually very prone to failing, particularly on deceleration of the engine as full bypasses the HP side during this which can cause a worn pump to fail.

aternatively if the Pump Control Unit is working when I check the signal on the HP solenoid I might consider getting a scrap pump and swaping the electronics so that the ECU does need re-programming.

Thanks for confirming the Imobiliser info.

Anyone know is another VP44 off say a ford / VW etc would be the same. The info Ive found to date seems to suggest that the difference in teh pumps comes from the ECU and or the number of cylinders.

Reply to
Wotbox

The VP44 is fairly reliable in my experience, however a loose or poor connection of the pump to the car can easily blow the internal controller- had that several times where the wiring has been poorly strapped, or the pull out thingy that clamps the plug on has been messed with or worked itself out...

Tim...

Reply to
Tim (Remove NOSPAM. Registry corupted, reformated HD and l

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