I'd want to hear the explanation of how the fuel pump is related to the turbocharger. The fuel pump is inside the gas tank, so if anything in the assembly was leaking, the gas would spill right back into the tank. If there was a leak in a line outside the tank, you would have smelled gas, and there would have been wet spots on the ground. A major gas leak, such as from a ruptured rubber hose, would cause the engine to stall. It can't run without fuel pressure. That would have caused the turbo to stop too, and nothing else would have been damaged.
If you aren't provided a suitable explanation, I would get a second opinion from a different shop.
Tuesday, March 28th, 2017 AT 2:08 PM