Avantime diesel power loss

I'm having some issues with my 2003 Renault Avantime diesel. It's got 215776 km on the clock. The check engine light is on, and the engine's power is way down. Response is terrible, sometimes it even stalls when I'm idling. Fuel consumption has gone up too. I'm hearing a whistling and a loud hissing when I accelerate. I suspect a boost pressure problem, maybe the wastegate valve, but I'm not sure what to do. Any ideas?

4 comment(s)

Interesting. I had something similar happen with my Avantime. Symptoms were a bit alike, mainly the reduced power and the noise. Have you checked the pressure sensor? Could be throwing off the whole system.

Thanks for the reply! Where exactly is the pressure sensor located, and how would I go about checking it? Is it a visual inspection or something more involved?

Okay, I am not a professional, but I'd strongly suggest you take it to a workshop. Based on your description, and my previous experience, my issue was in fact, also in the wastegate valve, and is crucial for controlling the boost pressure of the turbocharger. Trying to DIY it might cause more damages.

Thanks, I appreciate the advice. I took it to the shop, and you were right. It was a defect in the wastegate valve, and the whole thing cost me 860€ to repair. At least it's running properly again!

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