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Matt
Matt, Mechanical Engineer
Category: Volvo
Satisfied Customers: 20575
Experience:  BEng hons Mech engineering, in auto industry 22 years
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My car is a 2010 s40 r design 2.0 diesel the problem I have

Customer Question

Hi my car is a 2010 s40 r design 2.0 diesel the problem I have is that at low revs say below 2000 mostly and keeping a steady throttle it starts to splutter or miss and the car is a lot heavier on fuel. Our mechanic has fitted a new airflow meter..no change..and he reckons the fuel is going into the sump! Any ideas greatly welcomed!
Submitted: 11 months ago.
Category: Volvo
Expert:  Matt replied 11 months ago.
Hello
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firstly its worth considering fitting a new fuel filter as if only slightly blocked this can lower fuel supply pressure and choke the main pump, the pump will be more sensitive to this when its cold as diesel thickens considerably with low temperatures
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mso-bidi-theme-font:minor-bidi;}If OK then also check the connections to the EGR valve, if either the vacuum pipe of electrical connection are damaged / corroded then the EGR can be on all time which certainly will hurt performance. Its also possible that its a fault with the EGR valve so its worth removing the valve and cleaning it out with brake cleaner, if it looks particularly clogged then replace it.
Expert:  Matt replied 11 months ago.
Hi
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