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volvo v40 1.9t 2000 strange noise after start

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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nikestar
Posts: 3
Joined: 13 July 2011
Year and Model: Volvo V40 2000
Location: USA

volvo v40 1.9t 2000 strange noise after start

Post by nikestar »

Hello, have a strange noise from the driver rear side of the car for 3-5 minutes after car is started.
thank you. I uploaded the video on youtube, here is link below
[YouTube]

[/YouTube]
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jimmy57
Posts: 6694
Joined: 12 November 2010
Year and Model: 2004 V70R GT, et al
Location: Ponder Texas
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Post by jimmy57 »

That is the fuel tank leakage detection pump. It has a diaphragm that is moving up and down and a metal piece is moved with diaphragm to be detected for diaphragm stroke by a magnetic switch. Sounds like the metal stroke sensor piece is noisy. IF you have no codes then no worries. The pump is not cheap and the noise has no effect on the functioning.
If all is well it will do this for a time and then the squeak cycle should slow as pressure builds in tank.
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nikestar
Posts: 3
Joined: 13 July 2011
Year and Model: Volvo V40 2000
Location: USA

Post by nikestar »

Thank you. My fuel pump is noisy and I think I will replace it soon. Do they link somehow together? May be some maintenance can prevent a noise?
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