GTI V6-2.8L (AFP) (1999)
Note: Do not use any compressed air in the following test!
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Remove intake hose to combination valve on top of air filter -arrow- and blow in with low pressure.
The combination valve must be closed.
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Start hand pump.
The combination valve should open.
If the combination valve does not open:
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Replace combination valve.
With Generic Scan Tool
Combination Valve, Checking
Recommended special tools and equipment
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VAG1390 Hand Vacuum Pump
Test requirements
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No leaks in vacuum lines or hose connections.
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Vacuum hoses not clogged or kinked
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Pressure hose for Secondary Air Injection (AIR) Pump Motor not clogged or kinked
Test sequence
Vehicles with engine code AFP
NOTE: Do not use pressurized air for the following test.
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Remove front noise insulation.
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Disconnect vacuum hose from combination valve at Secondary Air Injection (AIR) Solenoid Valve -N112-, item 5.
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Connect hand vacuum pump (VAG1390) at vacuum connection to combination valve.