 | Home > Puma (Tdci) > Operation and unstable fuel pressure |
 
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| Bluest Member Since: 23 Apr 2016 Location: Lancashire Posts: 4227   
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The VCV, or suction control valve controls pressure to the fuel rail. They do wear out and usually cause unstable idle. When mine was having problems the Nanocom showed the fuel pressure fluctuating a lot, but their was no fault code. They are easy to replace. 2007 110 TDCi Station Wagon XS
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11th Aug 2019 7:02am |
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| williamthedog Member Since: 29 Dec 2012 Location: south wales Posts: 3441 
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If it's the vcv valve buy a genuine one, denso make them
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11th Aug 2019 7:15am |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2448  
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What sort of fluctuation are you reading? @ rpms? Puma 110" SW
............................................................. Earth first. Other planets later |
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11th Aug 2019 12:45pm |
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| Fernando Member Since: 25 Oct 2017 Location: CABA Posts: 92  
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r.p.m without increase, only at times uneven operation.
The vcv valve changed 6 months ago for a dense one !!! |
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11th Aug 2019 9:00pm |
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| HardCharger Member Since: 03 Mar 2013 Location: Manila Posts: 745  
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Maybe air is getting into the system? Check if your fuel filter is on secure and does not wobble when you try to move it. Check all connecting points in the fuel system to see if you can spot a leak or one that is not correctly secured on.
It could also be the copper washers and o-rings of the injectors. |
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12th Aug 2019 10:00am |
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| Fernando Member Since: 25 Oct 2017 Location: CABA Posts: 92
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I lean to the vcv valve, the toric seals and the copper washers were changed, the filter is firmly in place.
It can be the valve LR006866 ?? Regards |
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12th Aug 2019 10:16am |
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