Hissing noise - bit like a dump valve
Hi Guys,
Just got my car (XC60 2011 D3) back from the body shop (needed work done due to friendly neighbour). Anyway, the car is now making a hissing sound which is apparent when accelerating and just when you remove your foot from the accelerator. A constant hiss as you accelerate and then over a second or so it reduced as I take my foot off the accelerator peddle. Bit like a dump valve. I'm 100% certain it was not making this noise before it went into the body shop. Any ideas what it could be and what/where to look to identify the problem. I have had a quick look under the bonnet but nothing obvious presents itself. I'm not too keen on blaming the body shop as if it was them then they will most likely fix that and break something else. Boost (acceleration) is fine, no lights in dash. Any advice would be appreciated. Thanks
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