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Audi A5 3.0 d

823 Views 14 Replies 3 Participants Last post by  Johnb
Hi guys
I need advice my car has suffered with hpfp failure found the metal bits in hpfp so I鈥檓 looking at getting her fix as don鈥檛 think I want anything else to drive 馃槀 so just need few answers from someone that did something similar as would like to swap hpfp from cp4 to cp3 so would like to now what is involved where do I need to start i would like to get injectors cleaned as they will be full of metal filings thanks for any help
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That鈥檚 the picture of hpfp metering valve

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Fuel tank, high pressure rails and fuel lines need cleaning. You need a new fuel pressure regulator and a fuel pressure sensor, injectors need to be tested/replaced and a new fuel filter.

As for the CP3 conversion there are guides on how to do it on youtube, however the car won't run without re calibration.
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Fuel tank, high pressure rails and fuel lines need cleaning. You need a new fuel pressure regulator and a fuel pressure sensor, injectors need to be tested/replaced and a new fuel filter.

As for the CP3 conversion there are guides on how to do it on youtube, however the car won't run without re calibration.
I got full fuel system with cp3 pump so will have everything from fuel filter so will need to clean the lines from fuel filter to tank and the tank itself do you have any recommendations how to ?
yes I did look how to do on YouTube there is not many videos that I can find it but will keep looking yes I do know will need some calibration will get somebody to come and do this
For the tank you can use soapy water to clean it, wipe it clean and keep flushing it until the water is clear. Do the same for the fuel rail and lines and blow them out with compressed air. Then run in the ultrasonic.

As your car is a CCWA you will need a new lift pump also.
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What do you mean by new lift pump?
For the tank you can use soapy water to clean it, wipe it clean and keep flushing it until the water is clear. Do the same for the fuel rail and lines and blow them out with compressed air. Then run in the ultrasonic.

As your car is a CCWA you will need a new lift pump also.
is that the pump in the fuel tank ?
Your car has an additional electric pump. Which feeds the high pressure pump.

In tank pump -> Electric Pump -> High Pressure Pump
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Your car has an additional electric pump. Which feeds the high pressure pump.

In tank pump -> Electric Pump -> High Pressure Pump
do you know what it looks like or any part numbers ?
Number 24 in this link:


Part Number: 8K0906089A
I went from cp4 to cp3. Bobby Singh is your man.
I went from cp4 to cp3. Bobby Singh is your man.
did you went same way as my or you just decide to upgrade ?
My car kept going into limp when on full throttle. I didn't want to chance it with the cp4 throwing swarf into my fuel lines and possibly damaging my injectors so opted for the cp3. My car was mapped by Bobby a few years ago and the cp4 pump was on the limit. So went for the cp3 and the drivability is loads better plus I got more bhp and torque with the cp3.
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My car kept going into limp when on full throttle. I didn't want to chance it with the cp4 throwing swarf into my fuel lines and possibly damaging my injectors so opted for the cp3. My car was mapped by Bobby a few years ago and the cp4 pump was on the limit. So went for the cp3 and the drivability is loads better plus I got more bhp and torque with the cp3.
i wish i did it earlier now i got loads of more problems now but hopefully all be good i got all fuel system from cp3 coming this week from fuel filter include injectors. did you do it your self or Bobby Singh did it ?
Bobby fitted the pump etc, it needed to be mapped in so made sense for him to do it all.
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