92 Camry 2.2 liter sometimes take multiple tries before it starts up

What is your question?

My Camry every once and a while it takes 2 or 3 tries before it starts up and runs normal after that. I replaced the distributor, distributor cap, rotor, plugs, fuel filter, plug wires and fuel pump and it still does that. I checked the fuel pressure regulator, no fuel coming out the regulator when i remove the vacuum line and engine runs rough when i do remove the vacuum line from the regulator " i would think is normal". If anyone has any suggestions please reply. Thanks in advance.

What makes this problem better or worse?

just hard to start every once and a while

How long has your 1992 Toyota Camry had this problem?

few months