if its timed up correctly, then thats a pump fault. the pump can (or should be able to....) advance and ****** the start of injection point in relation to running conditions. im guessing it cant or doesnt have the full range the ecu thinks it should have.....
we sent one off to a company down south somewhere was off a '98 manual quattro (the car didnt run). it came back "rebuilt", the car now started.... but had this, or a v similar sounding fault code. was also really "flat" to drive. we sent the pump back to them and on second try was fine
you need to get it on the computer check the set up, and check its working.