Compression, Checking

Special tools and workshop equipment required 

• Spark Plug Removal Tool: 3122B 
• Compression Tester Kit: VAG1763 
• Compression Tester Kit - Adapter 13: VAG1763/13 

Test Sequence

• Engine oil temperature at least 30 °C (86 °F).
• Battery voltage at least 12.7 V.

-- Remove the ignition coils. Refer to IGNITION COILS, REMOVING AND INSTALLING .

-- Disconnect the connectors:

Fig 1: Identifying Connectors For Fuel Injectors

Courtesy of AUDI OF AMERICA, LLC

1. For the FSI Fuel Injectors in the Cylinder Head
2. For the MPI Fuel Injectors in the Intake Manifold

-- Remove the ignition coils. Refer to IGNITION COILS, REMOVING AND INSTALLING .

-- Remove the spark plugs with the : 3122B  .

Courtesy of AUDI OF AMERICA, LLC

-- Install the : VAG1763/13  as shown in the respective spark plug hole and connect the : VAG1763  .

Courtesy of AUDI OF AMERICA, LLC

-- Check the compression using the : VAG1763  . Refer to the Operating instructions.

-- Press the accelerator pedal down all the way and operate the starter long enough until the tester no longer indicates an increase in pressure.

-- Repeat the procedure on each cylinder.

Assembling 

-- Install the spark plugs. Refer to OVERVIEW - IGNITION SYSTEM .

-- Install the ignition coils. Refer to IGNITION COILS, REMOVING AND INSTALLING .

-- Delete the DTC memory entries in the engine control module that have occurred during the test using the Vehicle Diagnostic Tester.