Touareg V8-4.2L (BAR) (2007)
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Empty measuring container.
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Now operate remote control (VAG 1348/3A) for 15 seconds.
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Compare quantity of fuel delivered with minimum delivery rate in diagram (cm3/15s).
‹› Voltage at fuel pump with engine stopped and pump running is approximately 2 volts less than battery voltage.
If the minimum delivery rate is not attained:
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Check the fuel lines for possible restrictions (kinks) or blockages.
If lines are OK:
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Replace fuel filter. Refer to --> [ Fuel Filter ] See: Fuel Filter/Service and Repair/Fuel Filter.
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Repeat the test.
If specified value is again not obtained:
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Fuel Pump (FP) faulty, replace fuel delivery unit. Refer to --> [ Fuel Delivery Unit and Fuel Level Sensor ] See: Powertrain Management/Fuel
Delivery and Air Induction/Fuel Pump/Service and Repair/Fuel Delivery Unit and Fuel Level Sensor.
If the delivery rate has been attained but nevertheless you suspect a fuel supply system malfunction (e.g. intermittent failure of fuel supply system):
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Check FP current draw. Refer to --> [ Current Draw, Checking ].
Current Draw, Checking
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Check the current draw of the fuel pump as follows:
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Reconnect all disconnected fuel lines.
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Connect the multi meter (VAG 1715) with electrical current probe to the wire of the 4 pin connector terminal - 1 - - arrow - from wiring harness
to Fuel Pump (FP) unit, right.