Fuel Pressure Regulator Valve -N276-, CHECKING

WARNING: This page is about a different variant/trim than selected.

WARNING:

Follow the guidelines for a clean working environment when working on the fuel system. Refer to CLEAN WORKING CONDITIONS AND FUEL SYSTEM WORK INSTRUCTIONS .
Always follow these rules before and during work.

-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

Pay attention to the connection differences of the banjo bolt.

Check the banjo bolt on vehicles with two connections. Refer to Fuel Pressure Regulator Valve -N276-, CHECKING .
Check the banjo bolt on vehicles with three connections. Refer to Fuel Pressure Regulator Valve -N276-, CHECKING .

-- Remove the fuel return lines -1 and 2- from the banjo bolt.

Fig 1: Open Return Line Connection Location

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-- Seal the open return line connection with a plug -1-.

Fig 2: Sealing Open Connection With Blind Plug

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-- Seal the open connection from the banjo bolt with a blind plug -2-.

-- Connect the hose -4- on the open banjo bolt connection.

-- Hold this hose -4- in a suitable measuring container.

-- Hold this return line -3- in a suitable container.

-- Measure the return quantity from the hose as follows -4-.

NOTE:

The amount of fuel in the fuel injector from the hose -3- is not important for this test.

Fuel temperature greater then 10 °C (50 °F).

-- Start the engine and let it run in idle.

If the specified value is not attained, then the Fuel Pressure Regulator Valve -N276- is faulty.

-- Replace the Fuel Pressure Regulator Valve -N276-. Refer to Fuel Pressure Regulator Valve -N276-, REMOVING AND INSTALLING .

-- Remove the fuel return lines -1, 2 and 3- from the banjo bolt.

Fig 3: Sealing Open Return Line Connection

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-- Seal the open return line connection -1- with a plug.

Fig 4: Sealing Open Connections With Blind Plugs

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-- Seal the open connections from the banjo bolt with blind plugs -arrows-.

-- Hold these hose lines -2 and 3- in a suitable container.

-- Attach a hose to the open return line with a suitable connection -1-.

-- Hold this hose -4- in a suitable measuring container.

Fig 5: Return Line Hose Location

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-- Measure the return quantity from the hose as follows -4-.

NOTE:

The amount of fuel from the hose -3 and 3- is not important for this test.

-- Start the engine and let it run in idle.

If the specified value is not attained, then the Fuel Pressure Regulator Valve -N276- is faulty.

-- Replace the Fuel Pressure Regulator Valve -N276-. Refer to Fuel Pressure Regulator Valve -N276-, REMOVING AND INSTALLING .