At that mileage its probably worth changing the FPDM and cleaning the harness connections too. Maybe a good time to do a compression test too, it maybe all good, or you may find some unbalance between cylinders......no way of knowing until you compression test.
I am not sure seafoam is a good idea in through the inlet manifold, ive heard of a few hydraulic locking probelms! But, you did it and seems like all worked okay.
Can you do a fuel pressure test, see what the normal working delivery pressure is and also how much the pump delivers in say 30 secs.