My two penneth:-
Your timing is out - and not by much - either the FIP flange has been put back on out of place, OR, the belt is a tooth out ...
As James and Neilly have said, setting the FIP injection point can only be done using a DTI - see the video James linked to above...
Here are several more for your perusal:-
https://www.youtube.com/channel/UCRssffMP_F8_SCJcqFLq4Ow/search?query=injection+pump+timing
Mike at Britannica has a pragmatic no nonsense northener approach to stuff, which sits well with me....