↓ Advertise on Defender2 ↓

Home > Puma (Tdci) > Operation and unstable fuel pressure
Post Reply  Down to end
Page 1 of 1
Print this entire topic · 
Fernando



Member Since: 25 Oct 2017
Location: CABA
Posts: 84

Argentina 2008 Defender 110 Puma 2.4 SW Bonatti Grey
Operation and unstable fuel pressure
See if you can guide me to solve this problem!
ith the engine regulating, the operation is unstable, with the nanocom connected, it marks unstable fuel pressure, what may be happening ???

regards
Post #786204 11th Aug 2019 1:44am
View user's profile Send private message View poster's gallery Reply with quote
Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3993

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
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
Post #786209 11th Aug 2019 7:02am
View user's profile Send private message View poster's gallery Reply with quote
williamthedog



Member Since: 29 Dec 2012
Location: south wales
Posts: 3441

2011 Defender 90 Puma 2.4 PU Tamar Blue
If it's the vcv valve buy a genuine one, denso make them Thumbs Up
Post #786216 11th Aug 2019 7:15am
View user's profile Send private message View poster's gallery Reply with quote
MK



Member Since: 28 Aug 2008
Location: Santiago
Posts: 2255

Chile 2007 Defender 110 Puma 2.4 SW Chawton White
What sort of fluctuation are you reading? @ rpms? Puma 110" SW

.............................................................
Earth first. Other planets later
Post #786260 11th Aug 2019 12:45pm
View user's profile Send private message View poster's gallery Reply with quote
Fernando



Member Since: 25 Oct 2017
Location: CABA
Posts: 84

Argentina 2008 Defender 110 Puma 2.4 SW Bonatti Grey
r.p.m without increase, only at times uneven operation.
The vcv valve changed 6 months ago for a dense one !!!
Post #786392 11th Aug 2019 9:00pm
View user's profile Send private message View poster's gallery Reply with quote
HardCharger



Member Since: 03 Mar 2013
Location: Manila, SFO, Amsterdam
Posts: 669

2011 Defender 110 Puma 2.4 SW Stornoway Grey
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.
Post #786437 12th Aug 2019 10:00am
View user's profile Send private message View poster's gallery Reply with quote
Fernando



Member Since: 25 Oct 2017
Location: CABA
Posts: 84

Argentina 2008 Defender 110 Puma 2.4 SW Bonatti Grey
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
Post #786440 12th Aug 2019 10:16am
View user's profile Send private message View poster's gallery Post Reply
Post Reply  Back to top
Page 1 of 1
All times are GMT

Jump to  
Previous Topic | Next Topic >
Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Site Copyright © 2006-2024 Futuranet Ltd & Martin Lewis
DEFENDER2.NET RSS Feed - All Forums