Checking the fuel pressure regulator
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Checking the fuel pressure regulator
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Warning
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Removal of the fuel pressure regulator is a procedure involving the car's fuel system. It is therefore necessary to observe the following precautions in conjunction with the procedure:
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Ensure good ventilation! If there is approved ventilation for extraction of fuel fumes then this must be used.
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Wear protective gloves! Prolonged exposure of the hands to fuel can cause irritation of the skin.
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Have a fire extinguisher class BE at hand! Be aware of the risk for sparks, i.e. in connection with circuit breaking, short-circuiting, etc.
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Absolutely no smoking!
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Use protective goggles.
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3.
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Start the fuel pump using the diagnostics tool.
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4.
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Check the reading at atmospheric pressure. The reading should be 3 bar (43 psi).
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5.
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Increase the vacuum in the pressure regulator by means of the pressure/vacuum pump. System pressure should drop by the same amount as indicated on the pressure gauge.
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System pressure
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bar (psi)
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3.0 (43)
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6.
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Pump up the pressure in the pressure regulator with the vacuum pump. The system pressure should now increase with the same amount as the reading on the pressure gauge.
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7.
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Switch off the fuel pump using the diagnostics tool.
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8.
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"Safety on" the adapter and remove the pressure measuring equipment from the service nipple. Collect any fuel spill with a rag.
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9.
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Remove the gauges and adapters; reconnect the hose to the fuel pressure regulator.
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