external/transfer fuel pump on my RS6 died after 68k miles-any suggestions?

[Ms_RS6]

The 044 is a beast of a pump. It's also really loud. As I recall, the RS6 fuel pump(s) are modulated so that when not under load they aren't run at full voltage, which mitigates this somewhat. Not sure how that would work with an aftermarket pump though.

Did you check the genuineaudiparts.com for the OEM pump? Probably still expensive, but might be less than your dealer.

Regarding the pump pressure, the pressure varies with flow. I have data showing the 044 pump delivering well over 500 kPa, but that was into a 5 cylinder with smallish injectors.

I do have the 044 Bosch Fuel Pump installed. It is a little loud, specially when you are running low on gas. I haven't had any issues with it. I decided to upgrade it since I was thinking of going with a full stage 4 MTM but was afraid of upgrading turbos since it is really expensive and labor intensive (and I didn't want to mess with anything major unless it was broken . I have Wagners, colder plugs, MTM Exhaust and recently gutted the downpipes. Anyway, I'm not too car technical and wish I could answer more questions about the pump but again, it hasn't given me problems and I have had it installed for more than 20k miles.

[ramin]

I do have the 044 Bosch Fuel Pump installed. It is a little loud, specially when you are running low on gas. I haven't had any issues with it. I decided to upgrade it since I was thinking of going with a full stage 4 MTM but was afraid of upgrading turbos since it is really expensive and labor intensive (and I didn't want to mess with anything major unless it was broken . I have Wagners, colder plugs, MTM Exhaust and recently gutted the downpipes. Anyway, I'm not too car technical and wish I could answer more questions about the pump but again, it hasn't given me problems and I have had it installed for more than 20k miles.

Hi Ms_RS6, thanks for the info. Did you install the 044 in-line outside the tank (there seems to be another similar looking pump that goes on the inside of the tank - the direction from 034motorsport sent by Ben 916 shows the pump installation inside a fuel tank)? If we are talking about the fuel pump that is installed outside the fuel tank, two more questions: (1) does the 044 fit in the old slot for the OE pump? (2) did you end up changing the OE piping?

Incidentally, I found the pressure requirements in the VAG Manual. The pump needs to deliver 0.8 to 1.3 bar to the fuel rail for OE set up.

[Ms_RS6]

Hi Ms_RS6, thanks for the info. Did you install the 044 in-line outside the tank (there seems to be another similar looking pump that goes on the inside of the tank - the direction from 034motorsport sent by Ben 916 shows the pump installation inside a fuel tank)? If we are talking about the fuel pump that is installed outside the fuel tank, two more questions: (1) does the 044 fit in the old slot for the OE pump? (2) did you end up changing the OE piping?

Incidentally, I found the pressure requirements in the VAG Manual. The pump needs to deliver 0.8 to 1.3 bar to the fuel rail for OE set up.

Here's the install and DIY link of when it was done to my car.
http://www.rs6.com/showthread.php/21...sure-regulator

[ramin]

Great, thanks Ms-RS6!

Did you also change the regulator (to a 5 bar one) and flash your ECU? The last comment on the thread you sent V8weight says " It may be kind of hard on the pump however, trying to push all that extra volume through a 4bar regulator."

By the way, found the answer to whether the Bosch 044 pump fits inside the tank. Apparently it does with some modification (not sure what kind/how much modifications though).

[Ms_RS6]

Great, thanks Ms-RS6!

Did you also change the regulator (to a 5 bar one) and flash your ECU? The last comment on the thread you sent V8weight says " It may be kind of hard on the pump however, trying to push all that extra volume through a 4bar regulator."

By the way, found the answer to whether the Bosch 044 pump fits inside the tank. Apparently it does with some modification (not sure what kind/how much modifications though).

I did change the regulator as well to a 5 bar. I also flashed the ECU.


-Maria

[ramin]

Thanks Maria, I am going to some research to see if I can avoid a reflash of the ECU