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Nissan Navara 2.5 2011 - Keeps dying on the road - Fixed #

Posted by John Moutrey on August 2, 2017, 6:16 pm

Year of Manufacture *: 2011
Engine Size and Code *: 2.5
( Optional ) Scanner Used: Snap on

This vehicle keeps dying on the road and looses performance AA went out to it and scanned it came back with fault code saying diesel leak . We've scanned it and drove it dozens of times and it never returns any codes but still dies on road test . Done live data on fuel pressure and it's all over the place from 8mpa up to 180mpa so replaced suction control valve ! Reset system and still exactly the same fault but can't understand the 180 now as this is 1800 psi seems too high ?over pressure valve in rail isn't bleeding excessive pressure off and doesn't seem to be any excessive inj bleed off so I'm now considering faulty pump or pressure sensor ? Can you guys throw any suggestions ?
Regards John

Re: Nissan navara

Posted by aidan birley on August 2, 2017, 6:31 pm, in reply to "Nissan navara"
Aidan Birley

Hi

Think i would check the pressure sensor out next, possibly scope it to see if it had jumps or drop outs.

Aidan

Re: Nissan navara

Posted by john moutrey on August 2, 2017, 6:33 pm, in reply to "Re: Nissan navara"
John Moutrey

Hi Aidan I ain't got a scope yet !! Any other way I can do it ?

Re: Nissan navara

Posted by Tony Ludford on August 2, 2017, 6:48 pm, in reply to "Nissan navara"
Tony Ludford

Forgive my ignorance, as I don't know the specific system, but what is the performance of the low pressure system? Is it a vacuum or pressure system? What are the figures?

Systems I work on with that code, are usually attributable to corroded fuel pipes or incorrectly fitted fuel filters allowing air ingress into a vacuum system.

Re: Nissan navara

Posted by john moutrey on August 2, 2017, 6:50 pm, in reply to "Re: Nissan navara"
John Moutrey

Hi Tony yes it's a vacuum system I'll run it direct from a separate supply tomorrow

Re: Nissan navara

Posted by Alan Lange on August 2, 2017, 8:22 pm, in reply to "Nissan navara"
Alan Lange

Hello John, 180mpa is 1800bar, (over 26000 psi). I have seen some diesel systems reaching this kind of figure under hard acceleration,I would be more concerned with 8mpa if the vehicle is dying on road test & not giving a fault code. As said, check supply to the pump first (assuming you've changed fuel filter?)

Re: Nissan navara

Posted by john moutrey on August 2, 2017, 8:53 pm, in reply to "Re: Nissan navara"
John Moutrey

Ye sorry Alan I meant bar !!
I know denso are working on a 3000 bar system !! Ye I know when I graph it on live data you can watch it just fall off under acceleration and when you back off it comes back up to normal until you try accelerating again
I've not personally changed filter as it's been done elsewhere not too long ago ! But will do as a matter of elimination

Re: Nissan navara

Posted by Antony Powell on August 3, 2017, 8:55 am, in reply to "Re: Nissan navara"

Hi John

Not trying to teach you how to suck eggs here but have you checked the basics....

I had a Vivaro last year with similar issue - died at 35 mph and picked up again if you backed off no codes etc

it turned out to be a crisp packet flapping up and blocking the air intake strangling the engine !!

just an idea.....

tony

Link: specialist seized injector and glow plug removal services

Re: Nissan navara

Posted by Andy Mason on August 3, 2017, 4:02 pm, in reply to "Nissan navara"
Andy Mason

We have changed loads of rail pressures sensors on these.
Some are a complete rail with sensor, others, if you get the number from the sensor can be sourced after market as a sensor only.
Andy

Re: Nissan navara

Posted by Shaun Dale on August 4, 2017, 10:27 am, in reply to "Re: Nissan navara"
Shaun Dale

Hi John,
I was going to say fuel pressure sensor and also check wiring from sensor and wiring to SCV but then saw your comment about pressure dropping off under acceleration. This is screaming fuel supply issue to me. I'd do the fuel filter first and check the old one for contamination. As mentioned could be rusty pipes but also could be Diesel bug or fuel contamination of some other type. If the filter fixes it that may only be temporary and you may have to take the tank out to clean it.
Shaun

Re: Nissan navara

Posted by Shane Gray on August 5, 2017, 4:44 pm, in reply to "Re: Nissan navara"
Shane Gray

Hi,

Had one of these with the filter in the tank blocked ! Worth a check.

Regards Shane

Fixed #

Posted by john moutrey on August 6, 2017, 7:01 pm, in reply to "Re: Nissan navara"
Edited by board administrator August 7, 2017, 2:01 pm

Fixed !!!! Big lump of crap in tank floating about !!thanks guys for the help

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