Hello and welcome to the site.
Take a look at ignition components. A misfiring coil or possibly a failing crankshaft position sensor can cause those symptoms. Maybe a bad fuel injector(s). Dirty fuel filter.
When you checked fuel pressure, did you ensure that the pressure was holding, i.e. a leak down test? I know you checked the vacuum lines, but did you do a smoke test to see if there are any leaks other than vacuum lines? These are just a few things I've ran into over the years.
Take a look at ignition components. A misfiring coil or possibly a failing crankshaft position sensor can cause those symptoms. Maybe a bad fuel injector(s). Dirty fuel filter.
When you checked fuel pressure, did you ensure that the pressure was holding, i.e. a leak down test? I know you checked the vacuum lines, but did you do a smoke test to see if there are any leaks other than vacuum lines? These are just a few things I've ran into over the years.