Test Sequence
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2020 Audi S4, 2020 Audi A4, 2019 Audi S4, 2019 Audi A4, and 2018 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
- Engine oil temperature at least 30 °C (86 °F).
- Battery voltage at least 12.7 V.
-- Remove the engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .
-- Disconnect the connector -1- for the FSI fuel injectors.
-- 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 .
-- Install the :VAG1381/13 as shown in the respective spark plug hole and connect the :VAG1763 .
-- 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) |