Fig. 172: Ignition Coils, Ground Wire And Connectors
Courtesy of VOLKSWAGEN UNITED STATES, INC.
Disconnect connectors - 3 -.
Pull out ignition coils - 1 -.
Use spark plug wrench 3122B to remove spark plugs.
Disconnect connectors from all injectors.
Fully open throttle valve.
Check compression with compression tester VAG1381 or VAG1763.
Operate starter until tester shows no further pressure increase.
Compression pressure
Install spark plugs and ignition coils.
Check Diagnostic Trouble Code (DTC) memory: --> Guided Fault Finding in VAS5051 - 01 ON
BOARD DIAGNOSTIC (OBD)
NOTE:
Using the compression tester.
New (bar) Wear limit (bar) Difference between cylinders
(bar)
9.0...14.0 7.5 max. 3.0
NOTE:
Replace gaskets for ignition coils if damaged.
NOTE:
Diagnostic Trouble Codes (DTCs) will have been recorded in DTC memory
because connectors have been disconnected. Check and, if necessary,
erase DTC memory after completing check.
2005 Audi A4 Quattro
ENGINE 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AMB
1:01:02 AM Page 115
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