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2004 S40 1.9T strange sound from exhaust.

Help, Advice, Owners' Discussion and DIY Tutorials on S40 and V40. In this forum you'll find S40/V40-specific owners asking and answering questions on maintenance, ownership, repairs, tutorials and almost every do-it-yourself thing you can do to save money owning these Volvos.

1996 - 2004 S40
1996 - 2004 V40
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FixXxer6
Posts: 48
Joined: 30 September 2013
Year and Model: 2004 S40 1.9T
Location: SoJack, MS 'MERICA!!!...yep...said it.

2004 S40 1.9T strange sound from exhaust.

Post by FixXxer6 »

Hello,

When I am cruising around at half throttle or less and then let off of the throttle (slowly), I hear a strange moaning or groaning sound from the exhaust. It's short and it sounds like it is coming from the firewall area where the downpipe starts to turn under the car. It kinda sounds like "BBOOOOOOOPPPP". It doesn't happen when I let off of the throttle fast. I tried a search on the internet with no luck. Has anyone heard this?
Si vis pacem, para bellum
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