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achimknight10

XC70 Jerking Acceleration

Alright, Volvo gurus, my 2012 XC70 diesel (248714 km) is acting up. It's jerking when I accelerate, and the check engine light is on. The reader throws an error. Engine power is reduced, sometimes stalling when idling. It's running rough, and there's a strong exhaust smell. I suspect an air intake issue, maybe the intake manifold? Could a scorching-related gasket leak mess with the air-fuel ratio?

4 comment(s)

janschmitz4

I had a similar experience with my XC70. Have you inspected the intake manifold itself for visible signs of damage or leaks? A leaking intake manifold gasket could explain those symptoms.

achimknight10 (Author)

Thanks for the quick reply! I haven't removed it yet, but I did a quick visual and didn't see anything obvious. Where should I be looking for these 'visible signs'? Any specific areas on the manifold or gasket that are prone to failure?

janschmitz4

Given the symptoms and the error code, combined with my experience, I suspect a leaking intake manifold. Visible scorching might be difficult to spot without removing the manifold. To avoid complications, consider having a professional mechanic diagnose and repair it. It's difficult to say where the leak is from without a thorough inspection.

achimknight10 (Author)

Appreciate the confirmation and advice! I took it to my mechanic. Turns out the intake manifold was defective, likely from scorching as I suspected. The final bill was 1180€, parts and labor included. Ouch! But at least she's running smoothly again.

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