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Audi
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1998
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A4 Avant
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/O Codes
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Symptoms
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AFTERBURN In Exhaust System
AFTERBURN In Exhaust System
Ensure no leaks exist in exhaust system.
Ensure base timing system functions correctly.
Check fuel injectors for leaking.
Check Engine Coolant Temperature (ECT) sensor operation.