You can try this because it worked for me. It's like bleeding a brake line, you have to get the air out of the line for it to run smooth. Use a vacuum pump or whatever to open up the fuel pressure regulator, and either keep turning the key on and off but don't start the engine, or apply 12V to the fuel pump connector at the tank and use a screwdriver to press the schrader valve fitting open, keep doing it until gas comes out of the schrader valve. Once it does, remove the vacuum from the regulator allowing it to close, and it should run smoother. If it doesn't you're either pulling air into the system through a tear in the line or loose connection, or you've got an injector issue or the pressure regulator is failing. I hope this helps!
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