Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Might be worth doing some research on common rail injectors as they dont fire as such like normal old fashioned ones as nothing can open that sort of pressure that fast etc, the piezo bit actually controls the leak off side, this is why when a common rail wont start you need to do a leak off test.
The leak off test kits are on ebay for about 30/40 quid.
17th Jun 2015 8:16 pm
19eddie82
Member Since: 21 May 2015
Location: Merseyside
Posts: 28
I'm probably gonna spend the next few evenings having a look and I've borrowed a snap on versus scanner that will probably do the job, failing that for some reason I'm thinking about taking the pump off again cause while it was off the one thing I didn't check was the fuel pressure control valve and it's just playing on my mind.
17th Jun 2015 8:16 pm
19eddie82
Member Since: 21 May 2015
Location: Merseyside
Posts: 28
Somebody suggested maybe one of the injectors may be leaking causing the pressure to drop so a leak off test may also be an idea!
17th Jun 2015 8:18 pm
M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8084
Robbie wrote:
19eddie82 wrote:
Now I know there is fuel to the rails but don't know how much pressure is there, could anyone tell me what pressure the injectors need to open and also how I go about checking it!
The fuel rail pressure should be checked with a diagnostic tool that has live data. During starting the injectors need at least 150 bar (2,175 psi) for the injectors to open.
I appreciate why you recommend the Iid BT tool over the basic model now Robbie, fantastic even gives pressure in psi
p.s. I assume the photos are from an Iid tool.It can when others can't,
It will when others won't,
It goes where others don't.
17th Jun 2015 8:24 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
lynalldiscovery wrote:
Might be worth doing some research on common rail injectors as they dont fire as such like normal old fashioned ones as nothing can open that sort of pressure that fast etc...
The absolute pressures may be stupidly high but the pressure difference between control chamber and the fuel at the nozzle needle is quite small, so the piezo does not have to work too hard and can react very quickly. It's just fun with hydraulics really.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
19eddie82 wrote:
Somebody suggested maybe one of the injectors may be leaking causing the pressure to drop so a leak off test may also be an idea!
Where I used to work the van guys were always doing leak off tests, one even told me the kit was to much hassle and took to much time, easier to just remove the leak off unions and watch how much fuel comes out while someone else cranks it over!
It sounded crude but he seemed to know what he was doing.
17th Jun 2015 8:42 pm
19eddie82
Member Since: 21 May 2015
Location: Merseyside
Posts: 28
I suppose it's a good excuse to do some online shopping, do they come in v6 or v8 versions? Once I've checked ile report back with the pressures and fingers crossed someone can point me in the right direction!
17th Jun 2015 9:35 pm
jeep948
Member Since: 16 Feb 2017
Location: Kelso
Posts: 200
Disco_Mikey wrote:
No, but its nice and easy.
HPFP belt off
Little M6 bolt (8mm head) holding the plastic cover to the pump
Fuel pipes off (plastic and metal)
Oil filter out
Breather canister thing comes out. Just!
4x M8 (10mm head) bolts holding the pump onto the engine
Hi Mikey,
I know this is an old post but is the Eu4 process any different from the EU3 one you posted instructions for?
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