I bought a modified 2000 MRS that is turbocharged. All of the mods look like the person who did the work knew what they were doing. But I am puzzled by a vacuum line, with no check valve or any other device, that looks like it was added to the top of the fuel pump housing. Does this make sense to anyone? I am worried about what happens when the engine is under boost. All of the original lines are still connected, the EVAP system is intact, and there are no codes.