Need some help with my volvo

[Gashgusher]

It keeps cutting out violently at 4500 rpm under load. Swapped leads fuel filter coil an jus about to swap injectors. Turbo doesn't lose pressure or anythin. Any (sensible) ideas appreciated ta

[Will F]

surely at 4500 it would be under load anyway??

Does it rev through, or die completely?

Could be in limp mode....

[Gaz1300SR]

Boost cut. Air leak maybe in boost pipes

[Alanmc]

Sounds like its a bit of an overboost fault so it cuts the boost altogether, i'd try an air flow meter if all the boost and vacuum pipes look ok