My 740 Turbo was running like butt and it had a massive fuel economy problem.
Refurbishing the injectors and changing the fuel filter helped.
Afterwards, there was a lot less hesitation, particularly when cold. I suspect the old injector seals were acting as a bit of a vacuum leak and the fuel filter probably hadn’t been changed in 15 years.
It’s not something you’d do often, but if you’ve got an old set of injectors, it’d be worth doing this and combining it with an ultrasonic clean if you can get it done cheap. This is particularly relevant for a car like this, where a replacement set of injectors in Aus would have cost me from $200-400.