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Why will car start good run 10 seconds go dead may or not restart but stay running and suspect relay switch for fuel know where located hear pump kick in only sometim?

Possible Causes:

- Fuel Pump Relay: The fuel pump relay is responsible for supplying power to the fuel pump. If the relay is faulty, it may not be able to provide enough power to the pump, causing the engine to stall.

- Fuel Pressure Regulator: The fuel pressure regulator controls the pressure of the fuel in the fuel system. If the regulator is faulty, it may not be able to maintain the correct fuel pressure, which can cause the engine to stall.

- Clogged Fuel Filter: A clogged fuel filter can restrict the flow of fuel to the engine, causing it to stall.

- Faulty Fuel Pump: The fuel pump is responsible for delivering fuel to the engine. If the pump is faulty, it may not be able to deliver enough fuel, causing the engine to stall.

Note: Before replacing any of these components, it's important to diagnose the problem correctly. This can be done by checking the fuel pressure and inspecting the fuel filter.