Introduction To VAG PD Engine (Pumpe Duse) E-Learning

VAG PD (Pumpe duse) unit injector system is a high pressure integrated direct fuel injection system for diesel engines, combining the injector nozzle and the injection pump in a single component. The plunger pump used is usually driven by a shared camshaft. In a unit injector, the device is usually lubricated and cooled by the fuel itself.
High pressure injection delivers power and fuel consumption benefits over earlier lower pressure fuel injection by injecting fuel as a larger number of smaller droplets, giving a much higher ratio of surface area to volume. This provides improved vaporization from the surface of the fuel droplets and so more efficient combining of atmospheric oxygen with vaporized fuel, delivering more complete and cleaner combustion.
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[@dylanleszek4895]

So happy to have found this video

[@planet1250]

Thanks, it kept me company and it's good to review topics

[@SYDiagnostics]

Glad it was helpful!

[@mdsymonds75]

Watched a similar training video the other day when my simple Google search to find out what "PD" stood for and where is the high pressure pump located🤔 turned into a rather interesting 1hr long training session. Very clever system.

[@SYDiagnostics]

Was it this video? I've 2 channels but closing the other one down

[@sasakravic4412]

Same thing just happened to me as well :-)

[@Ricardo_Caracol]

nice for sharing great information...cheers from portugal

[@ElliHoy]

excellent video thanks

[@simonparkinson1053]

Nice one Steve!

[@SYDiagnostics]

Many thanks!

[@davidgore92]

Nice info steve 👌🏼

[@SYDiagnostics]

Thanks 👍

[@badreedinemohammedi5277]

What I want know is the scrow of a selonoid must be fixed or we can open it and close it to let the injector work good

[@olsmokey5256]

Now I know how the injection system works. Internal fuel delivery, high pressure, injection time and fuel return. No wonder the injectors cost $600 - $800

[@Igloo5555]

$600-800 if you’re lucky buying used nowadays 😂

[@soranghafour]

Very informative mr Steve as always, thanks for sharing , do you know where that one way valve located after fuel filter on BMN engine code please, I have an Audi A3 that hard starting as the fuel keep drawing back to fuel tank . Thanks

[@elvisvwvw]

you have intank pump on that engine. so i guess you had leaking rubber seals on injecors, that is a common fault for hard start on bmp and bmn engines

[@tmarinelic]

Smooth and quiet!?!
Ahhhhahahahaaa.....
There went VW credentials