I’ve slowly been working thru a similar issue. Mine always starts, just not easily. Here’s what I’ve done since getting the vehicle last year and it seems to be improving things:
New fuel filter
New fuel pressure regulator
New Pcv valve
My starter died, so new reman’d denso starter
Pulled and cleaned cold start injector
The wire from ignition coil was not seated firmly either.
I’m pretty aggressive with adding Techron to fuel regularly as well.
It now consistently starts after a a 4 or 5 count on the starter on the first try, or immediately on a second try. It does still stumble start for a second if it catches on the first try. —90 3fe