The Volkswagen Jetta Fuel Pump pumps gasoline from the rear tank to the carburetor or fuel-injection unit, which allows the engine to start and continue to receive the appropriate pressure to drive freely. The first-generation automotive car engines that utilized carburetors were based on a mechanical pump bolted next to the engine, and its lever pushed by the cam pulled the fuel forward at approximately six psi, which is appropriate to the float bowl but not needed in modern high-pressure systems. When subsequent models incorporated electronic injection, Volkswagen replaced this with an electric in-tank pump that rotates at a faster rate, injects 40-60 psi, remains cool as it rests in the fuel, and is controlled to do this at the appropriate time by precise commanding of the onboard computer. The highly important variations are location, pressure capability, and electronic control; however, the objective remains the same, to move the right volume in a second. When the car sputters, stalls after stopping, or cranks without igniting, drivers can tell something is amiss with the Fuel Pump that is no longer able to accumulate enough fuel to meet the demand. Whether the circuit, relay, or the pump itself is faulty can be determined by a quick listen for its whir, a voltage test at the connector, or a pressure test. When applied correctly, the electric unit can easily cover more than 100,000 miles in the life of a Volkswagen, although it is not uncommon to replace the unit after 60,000 miles, and due to the robust mechanical design it will last just as long as the pressure is kept constant. Early replacement of filters ensures that the Fuel Pump remains clean and your Volkswagen fires quicker as your Jetta key turns.
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