Heavy smoke on startup... causes?

[BiG K]

FPR was replaced yesterday (for a good used unit) and so far it seems to have cured the problems. No smoke on startup, engine runs smoother and seems to have more punch. Under heavy load FPR goes to 85% max. I guess the pump is still worn a bit too, but the car has done 230k.

The injectors were brand new. Not refurb/recon or used. 4 brand new 073 injectors from Bosch. There was no reason to replace the injectors other than I got the injectors cheap.