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The following symptoms are relevant regarding sudden clicking noises and log file analysis.
Possible catalytic converter damage if the engine is jacked up roughly.
More information to follow soon.
Symptoms: Loss of power, mainly in the higher RPM range, despite a presumably functioning mass airflow sensor (MAF) and correct boost pressure; sometimes, delayed boost pressure build-up in the lower RPM range.
Increased fuel consumption is possible, but usually there is no increased soot emission.
When reading the air mass values at full load, there may be an apparently inexplicable drop in the upper RPM range.
Knocking sounds (resonances) may originate from the direction of the exhaust.
Problems tend to arise more abruptly.
Common causes: The exhaust pipe's cross-section is narrowed due to fragments from a broken catalytic converter or due to an obstruction.
Tests: Tapping test (knocking?) on the exhaust near the catalytic converter.
Troubleshooting by: Replacing defective exhaust parts.
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