[ameoba]

I think I understand where the confusion is coming from.

There is an HPFP on the FSI engine.

The fuel rail operates at 110 bar (1600 PSI). The only way to get there is an HPFP. The HPFP on the FSI 3.6 (and the smaller 4 cylinder FSI motors too) is mounted to the block and driven by the crankshaft. See page 36-38 in the attached SSP.

Now - what he describes doesn't sound like the HPFP. I would check things in this order:

• Coil packs
• LP Fuel Pump / Fuel Filter (tank mounted)
• Injectors

GL!

 

[ameoba]

Pops - there are two of them on your 09. They are located in the tank (access under the rear seats). It seems like it is just about impossible to diagnose which one is bad when one goes bad - so it's likely easier to replace both. That said, the FP on the FSI motor is pretty bulletproof - my question to you would be "Are you certain it's a fuel pump that is bad?" What is the vehicle doing that leads you to believe its the FP? There are a lot of other things that usually go wrong before the FP does - bad coil pack, bad spark plug, fouled fuel injector, or even just a plugged fuel filter (which, ironically is wrapped around the fuel pump).

 

[ameoba]

That sure sounds a lot like a bad coil pack or coil packs, not a fuel pump. But those codes are all fuel system related, not ignition.

Do you have access to a VAG-COM / VCDS and not a generic code reader (those are generic OBD II codes)? I'd get a full scan done, reset all the fault codes, and then see what comes back if it's intermittent. Post your location so people know where you are too.

18726/P2294/008852 - Ross-Tech Wiki
18725/P2293/008851 - Ross-Tech Wiki