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Unsteady Engine and White Smoke in Audi A4: HPFP or Injector Failure?

I'm experiencing some issues with my Audi A4. The engine is unsteady and there's white smoke coming out like crazy. I've noticed diesel pooling on top of the engine near the high-pressure fuel pump (HPFP) and in the exhaust tips. I'm wondering if this could be due to the HPFP leaking and failing. I've also got a code P229400 indicating a problem with the fuel pressure regulator 2 control circuit. Could all these issues be related to the HPFP or is it possible that the injectors are failing? Any advice would be greatly appreciated.

An Audi A4 is experiencing an unsteady engine and excessive white smoke, with diesel pooling near the high-pressure fuel pump (HPFP) and exhaust tips. A diagnostic code indicates a fuel pressure regulator issue, suggesting a potential HPFP leak or failure. The problem could also stem from malfunctioning fuel injectors. It is advised to inspect the HPFP for leaks or damage and check the injectors for any issues.

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Start by inspecting the high-pressure fuel pump (HPFP) for any visible leaks or damage, as a leaking HPFP can cause diesel to pool and lead to unsteady engine performance. Check the connections and seals around the HPFP for any signs of wear or damage. If the HPFP appears intact, consider inspecting the fuel injectors for leaks or malfunctions, as they could also contribute to the symptoms you're experiencing. Let me know how the inspection goes or if you have any further questions.

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AUDI

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