Runs like there is water in gas. Changed gas and still have same problem. Stutters, stalls, runs rough, using a lot of gas. Changes so far; EGR valve, O2 sensor, plugs, plug wires. Every change seems to be O.K. then after a couple of miles, it starts all over again. Is also making a slight noise.
Please list codes
Locate the fuel pressure regulator on the fuel rail.
Remove the vacuum hose from the regulator.
If gasoline leaks out of this connection, the regulator diaphragm has a leak and gasoline is being sucked into the engine causing the engine to run too rich.