S5 Quattro Coupe V8-4.2L (CAUA) (2009)
-
Remove the spark plugs with Spark Plug Removal Tool (3122 B).
-
Check compression pressure using the Compression Tester (V.A.G 1763).
‹› Using tester => operating instructions.
-
Have a second technician press the accelerator pedal down all the way while operating the starter until the pressure increase is no longer displayed
on the tester.
-
Repeat procedure on each cylinder.
Assembly is in reverse order of removal, note the following:
-
Install spark plugs.
-
Install rear noise insulation.
Faults are saved in ECM when electrical connectors are disconnected:
-
Connect Vehicle Diagnosis, Testing and Information System (VAS 5051B).
-
Start "Guided Functions" operating mode.
-
Generate readiness code in ECM.