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How can I troubleshoot the ethanol fuel injection system on my Audi A2?

I have been experiencing engine performance issues with my Audi A2 and I suspect it may be related to the ethanol fuel injection system. What are some steps I can take to troubleshoot and potentially diagnose the problem?

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First, check the fuel injectors for any clogs or build-up. If they appear dirty, consider using a fuel system cleaner. Additionally, inspect the fuel lines for any leaks or cracks.

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