Did fuel pressure test, turn ignition 38psi, start car 43 psi, good, my problem is have to crank 5-7 seconds before car starts, gas smell when does, no gas leaks anywhere, turn ignition pressures up to 38psi if i dont start the car and just leave it fuel pressure drops fairly rapidly, should system stay pressurized until i start car? Im thinking i have a fuel injector leaking, and if i do how do i determine which one, can i just isolate one side of fuel rail by pinching fuel line in front of car connecting the 2 fuel rails?

sniff the fuel pressure regulator vacuum hose. You might have a faulty fuel pressure regulator if you smell any hint of gas.

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2007 Suzuki XL.7 (totaled)
1993 Honda Civic Del Sol (sold)
2008 Suzuki Grand Vitara (current passenger/cargo Vehicle)
1990 Nissan 300zx 2+2 N/a (current DD)
1998 Chrysler Sebring (beater/fixer project/snow car/college commuter...)