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Home > Puma (Tdci) > 2.2 TDCI Fuel Pressure Regulator 1 Exceeded Control Limits
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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 2030

United Kingdom 
It does seem to be the HP pump....however have you undertaken a fuel leak off test to check if one or more of the injectors is leaking off a significant amount of diesel.

Have a look at this video, that highlights a similar issue you are having , albeit with different DTC’s but it’s a different vehicle and Diesel engine so my throw different codes for same issue.

https://www.youtube.com/watch?v=E89oncZcZgg


If you look at this next video, from approx 5 minutes 20 seconds in it shows how to connect up the test kit.
Be careful with the green clips which can break and it’s apparently hard to source replacements.

https://youtu.be/vgKJ6k0VM3M?si=FpSTDvLyw9rW-pMH

Ps- if it is an injector issue, the Nanocom did have issues coding new injectors on the 2.2, however they said they fixed that with release 1.36 https://www.nanocom-diagnostics.com/news/n...re-upgrade
Post #1013352 31st Oct 2023 1:18pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17443

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Don't forget also that the market is currently awash with counterfeit VCVs, so unless you are absolutely certain that you have a quality part, I shouldn't rule out a faulty VCV just yet.
Post #1013353 31st Oct 2023 1:47pm
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Borbarad



Member Since: 05 Aug 2020
Location: Hamburg
Posts: 44

Germany 2013 Defender 110 Puma 2.2 SW Fuji White
Well, I also have issues apparently with my Nanocom…. Upgraded to 1.36 as i nevert had a Pump learning menu or the like….

No I have not just the defender, but also a discovery and range as well es as a new ODB menu.

Under this ODB Menu I find Pump learning. But if i start this one i get an error 7s.

and now on the other hand the Pilot menu is gone…. I only can read the injectors….

B
Post #1013362 31st Oct 2023 2:28pm
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Borbarad



Member Since: 05 Aug 2020
Location: Hamburg
Posts: 44

Germany 2013 Defender 110 Puma 2.2 SW Fuji White
A few shots (idling)….

B












Post #1013364 31st Oct 2023 2:36pm
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Borbarad



Member Since: 05 Aug 2020
Location: Hamburg
Posts: 44

Germany 2013 Defender 110 Puma 2.2 SW Fuji White
Well, it really seems we have to change the pump… awefull job. But then we replace the chain as well in one go…. ( the engine has 220k on the clock)

Is there somewhere a good Description about changing the pump and the timing procedure??? The Workshop manual has zero about this….

B
Post #1013408 31st Oct 2023 6:32pm
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Borbarad



Member Since: 05 Aug 2020
Location: Hamburg
Posts: 44

Germany 2013 Defender 110 Puma 2.2 SW Fuji White
Just an update: we replace the complete hp fuel pump. What caused the defect we have no idea…. Probably needs to be disassociated to figure out what internally went wrong. Replacing the valve didn’t do anything.

B
Post #1021111 14th Jan 2024 11:04am
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andy63



Member Since: 30 Jun 2023
Location: north east
Posts: 531

United Kingdom 
As long as you are sure that pump failure wasn't due to breakdown of the metal contaminating the whole fuel system with microscopic particles..
I've heard about that, and pumps been changed without total cleaning of the whole fuel system from tank to injectors.. Then having further problems as the injectors are damaged if it reaches them....
Post #1021119 14th Jan 2024 11:32am
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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 2030

United Kingdom 
Borbarad wrote:
Just an update: we replace the complete hp fuel pump. What caused the defect we have no idea…. Probably needs to be disassociated to figure out what internally went wrong. Replacing the valve didn’t do anything.

B


Thanks for the update Borbarad, hopefully all will be ok now and any potential contamination from HP pump failure has been cleared from the fuel system.

Interesting to note the VCV was not at fault, so far on the 2.2 I have not heard of one failing. Many have suspected the VCV when having issues on the 2.2 but changing has made no difference.
Obviously on the 2.4 the VCV is weak and causes many issues, however on the 2.2 it is a different design / component and seams to be a far more reliable solution.... ps I’m not saying the 2.2 is better than the 2.4, both engines have pros and cons, however one pro for the 2.2 is the reliability of the VCV compared to the 2.4.
I’ve tempted fait now Rolling with laughter
Post #1021126 14th Jan 2024 12:28pm
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