A6 Quattro Sedan V6-2.8L (AHA) (1998)
Compression Check: Testing and Inspection
Test requirements
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Engine oil temperature at least 30°C (86°F)
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Battery fully charged
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Disconnect harness connectors from all 6 fuel injectors.
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Disconnect 5-pin harness connector from power output stage of ignition coils.
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Open throttle fully.
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Use VAG1381 or VAG1763 compression tester to check compression.
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Operate starter until pressure reading on tester no longer rises.
Compression pressure