Vehicle stalls and hard to start

Vehicle shut off while coming to a stop. I tried starting it and it cranked but did not start. After a couple of tries it started and ran well but one I pulled into my drive way it stalled again. The next morning the vehicle started after a couple of attempts. But it started to bog down like if it wanted to die and eventually it shut off after a couple of minutes. I cleaned the throttle plate and had an assistant depress on the gas pedal to move the throttle plate but it did not move. So I disconnected the throttle connector and moved the plate and cleaned it thoroughly. Once finished I started the car after a couple of attempts of trying. Car started and idled a lot better did not bog down, drove it for a while and it stalled again but this time it started right back up with no problems, continued driving it for about twenty minutes and it never stalled again. I shut it off and left it sitting for like an hour before I attempted to started again. Car started right up and idled perfectly. Next morning I started the vehicle without no problems, but shut off after a minute or so. The check engine light is not on, so no codes. I checked fuel pressure it reads 60 psi. While at idle it goes close to 69 psi. What could be the problem?