C1 rough cold start

I had something similar with my C1. Have you checked your fuel rail pressure? Poor engine running and hard starts sound familiar.

Thanks for the tip! How did you figure out it was the fuel rail? What were your symptoms exactly?

The symptoms were very similar to what you described. I'm no expert, but it sounds like an injection valve/injector defect. I took it to a workshop, and they said it was a faulty cold start injector. Probably best to get it checked out by a professional.

Thanks, I appreciate the advice! I took it to a shop, and you were right. The cold start injector was faulty. Cost me 515€ to fix, but it runs like new now!