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Home >> Audi >> 2019 >> A4 Premium >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head, VALVETRAIN [CVKB, DBPA, CWNA, CVLA, DEMA, DHDA, DKUA] >> 15 Cylinder Head, VALVETRAIN >> Cylinder Head >> Compression, Checking >> Test Sequence

Test Sequence

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

-- Disconnect the connector -1- for the FSI fuel injectors.

Fig 1: Identifying Connectors For Fuel Injectors
GWWA15-11487Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the connector -2- for the MPI fuel injectors/fuel injection valves.

-- Remove the ignition coils with power output stages. Refer to IGNITION COILS WITH POWER OUTPUT STAGES, REMOVING AND INSTALLING .

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

GWWA28-10143Courtesy of AUDI OF AMERICA, LLC

-- Install the :VAG1381/13  as shown in the respective spark plug hole and connect the :VAG1763  .

GWWA15-12161Courtesy of AUDI OF AMERICA, LLC

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

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

-- Repeat the procedure on each cylinder.

Compression Pressure Pressure
New 16.0 to 19.0 bar (232.06 to 275.57 psi)
Wear limit 12.0 bar (174.04 psi)
Maximum difference between cylinders 3.0 bar (43.5 psi)