Why does car struggle to start when engine is warm?

What is your question?

About 2months now car struggles to start when engine is warm but doesn't happen when engine is cold. Almost shuts off when struggling to turn over but starts. Do you know cause?

What makes this problem better or worse?

Worse when engine is warm & trying to start

How long has your 2008 Audi A8 Quattro had this problem?

Month or 2

Visitor

in Reading PA

·

Mar 19, 2025

·

1 Reply

Popular Answer
Devin Cabungcalon Mar 20, 2025

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I’m sorry to hear you're having trouble with your A8. A hard start when the engine is warm can point to a few possible issues, like a failing crankshaft position sensor, weak fuel pressure, or even a vapor lock situation. When the engine heats up, electrical components like sensors can start to fail intermittently, and fuel system components may struggle to maintain proper pressure. Checking for stored trouble codes and testing fuel pressure when the issue occurs can help pinpoint the cause. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!

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