Please do two checks for me, easy and helpful.

1. measure the rail fuel pressure passenger side front fitting near top of S/C. Takes a fitting, I use air conditioning gauge here. If you have no gauge, loosen the valve core and install the rubber hose over it to see the pressure, should be about 60 PSIG. Do this with someone else to start the car while your at the hose so that they CAN TURN OFF CAR if you have a leak. Pressure???

2. Measure the intake manifold to see that you have 20 inches of mercury, there are several points to measure it. The hoses below the TB is one point, though Id measure it at the fitting going off the manifold in the same region.

If you have a gross vac leak you could see this operation.

Measuring the fuel pressure would save you money and time doing the same thing over and over again with no different outcome.

Id also keep checking the codes to see if any different codes pop out.

Woody