2009 Ford focus injector fuse keeps blowing?

I have a 2009 1.6 tdci Ford focus and while driving it just cut out. After many different attempts at different things wrong, it turned out to be that the fuse for the injectors blew. So we changed the fuse and it blew again while it was driving. I don't have the car long and it recently got a new engine. Anyone know why this is happening?

Take it to mechanics

The circuit is being overloaded. There could be a short to ground or the fuse is not up to the proper rating.

The injector circuit is shorting, a power wire/s is shorting to ground or an injector/s is shorted (no resistance). Time for a tow to a garage.

Disconnect all the fuel injectors and do and ohm test on each of them. If one is out of range it may be shorting the system and blowing the fuse.

Failing injector or fault causing overloading /grounding. These can be tricky to find source without proper testing .a garage ought to run diagnostic and can use a multi meter etc to pinpoint exact area and cause. This sort of niggling faulty can be both time consuming and troublesome so its best to pass to an expert whom will quickly ( normally) trace and fix for you.