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Discussion Starter #1
First of all I hope I've put this in the right place.
So I bought a 2007 2.5dci Nissan Navara Aventura with 86k miles, full service history etc.
After running it for a few days I've noticed it running as though it's missing, stalled a few times on idle and just generally sounds a bit rattley.
I've read numerous posts about injector knock, injector rattle etc so tried a forte injector cleaner first (no change), then gave it a full service and cleaned the MAF sensor ( MAF was black rotten but again no difference).
Upon servicing and blanking the egr I took the engine cover off and found it really damp like they've being spraying out (please see pics).
My question now is does it look like the injector seals have gone or the injectors themselves. I've done nemerous ECU resets after everything I've done and found 2 codes. They are 1614 which I found meant NATS Malfunction and 1271 Air/Fuel Ratio Sensor 1.
Can I take it to any garage and get them to check injectors and get them to send off for testing/refurbing or can I just buy new injectors and get the local garage to fit them.
I feel like I should also mention I'm about maxed out on my mechanical knowledge and could really use a bit of advise. Thank you in advance
 

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Have you tried a hard reset, disconnect battery both leads and leave disconnected overnight to discharge fully, clean all the rocker cover of oil check the fuel lines to injectors for tightness, reconnect battery and look for oil leaks possibly from injector seals, see if noise is reduced, could also be scv problem
 

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Sorry should of mentioned, I cleaned all rocker cover with a degreaser and checked again next day after a run to work and it was a bit damp again, so i checked tightness on lines going to injectors and they are solid, a couple of the nuts on the other side nipped up a touch however. I haven't tried a hard reset yet, will I have any issues with sat nav or radio if I do that? Thanks for the suggestions though matey it's very much appreciated
 

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The only problem youll have with the radio is youll loose your pre set radio stations
It does indeed look like somethings leaking have you tried clean it all up and watch it while its running see if you can see where its coming from?
As for the injectors there almost completely inside the rocker cover and all you can see is the plug and diesel pipe connection I would be thinking this looks more like a bad seal between the injector and the pipe! But you need to know exactly where its coming from!
Navaras do have noisy injectors so maybe that's not an issue and the running problems your experiencing sound more like a possible suction control valve problem!
Also what's your oil like? Injector leaks can contaminate the oil!
 
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Discussion Starter #5
Again thanks for the reply. When I cleaned them off I did leave it running for a while to see if i could see anything leaking but nothing obvious. I had the Mrs rev it aswell but still nothing. When I drove to work and back the next day (15 mile round trip) I took the cover off and they were damp again so something definitely leaking. I should of also said when I put the diesel flush through last week I let it get upto temperature and after about 10 minutes gave it some and it splutered and went into limp mode. I turned it off and on again and it drove ok again (still with the bit of a splutter and engine rattle).
 

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P1271 is actually no4 cylinder diesel fuel injector solenoid stuck open, air/fuel ratio sensor 1 is for the petrol engine,
This may have something to do with the problem, in which case probably worth having that injector taken out and tested by a diesel injector specialist local to you, also does the dampness smell of diesel.
 

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Engine oil does tend to leak from the injector seals where the fuel pipes are these just pull out of the rocker cover and can be replaced you have to disconnect fuel pipes first, also oil can leak from the seals around the top of the injectors these seals are however part of the rocker cover.
 

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Discussion Starter #8
P1271 is actually no4 cylinder diesel fuel injector solenoid stuck open, air/fuel ratio sensor 1 is for the petrol engine,
This may have something to do with the problem, in which case probably worth having that injector taken out and tested by a diesel injector specialist local to you, also does the dampness smell of diesel.
Thankyou, I'll see if I can find one near me. Makes sense. As for the smell of diesel I'll check tomorrow. I initially thought it was oil just been spilled over time but as I said I cleaned it and it's back almost straight away. With regards to the oil as mentioned above I gave it a full service as we live on a slight bank and a couple of times after parking up on the opposite side to our house the oil low light came on. It's maybe all connected. It is a nice thing im just wondering now on how much all this going to cost 😭
 

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Did you change the fuel filter? If you did, this can also present a problem with air getting into the fuel line if it was an aftermarket fuel filter
 

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Did you change the fuel filter? If you did, this can also present a problem with air getting into the fuel line if it was an aftermarket fuel filter
It was actually the local garage that did the service so I don't actually know what filter they used. I thought kill two birds with one stone.
Another stamp in the book and saves me rolling about on the floor trying to drop the oil 😂
 

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Did you change the fuel filter? If you did, this can also present a problem with air getting into the fuel line if it was an aftermarket fuel filter
Good call I didn't pick up on that!
The cheep fuel filters are well known for causing starting/running problems!
When it's misbehaving shut it down and squeeze the primer bulb underneath the fuel filter! It should be fairly firm! but if its soft air is getting into the fuel system!

The fuel system before the fuel pump is under a vacuum so it will suck air in rather than blow fuel out!
Air in the fuel will cause it to cough and splutter! Also its possible air is getting in near the injectors (wet spot is post fuel pump so now under pressure) however I would expect air in here would self-purge within seconds!
 
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It was actually the local garage that did the service so I don't actually know what filter they used. I thought kill two birds with one stone.
Another stamp in the book and saves me rolling about on the floor trying to drop the oil 😂
I went to school with the lad who works in the garage so I hung about and did the easy stuff egr blank, MAF sensor clean and air filter.
Good call I didn't pick up on that!
The cheep fuel filters are well known for causing starting/running problems!
When it's misbehaving shut it down and squeeze the primer bulb underneath the fuel filter! It should be fairly firm! but if its soft air is getting into the fuel system!

The fuel system before the fuel pump is under a vacuum so it will suck air in rather than blow fuel out!
Air in the fuel will cause it to cough and splutter! Also its possible air is getting in near the injectors (wet spot is post fuel pump so now under pressure) however I would expect air in here would self-purge within seconds!
 

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Discussion Starter #13
Could that be the original problem or just an additional one? Just because it was driving lumpy, rattling on accelerating and stalling the odd time before the fuel filter change. Ever since I bought it in fact. In my ultimate wisdom I just assumed it needed a service as the guy I bought it from said it'd been stood for a few months due to the covid 19/world gone crazy pandemic.
It got a full engine service just to see if that helped and because a couple of times when parked over the road the oil low light came on. If I'm honest I thought the dampness around injectors was oil and secretly hoped when they'd last changed oil they'd spilled a good amount around filler cap and that's what's caused all the black oily **** around injectors, the low oil light and the sounding like a tractor. I don't know whether it's just because I'm leaning towards an injector fault but it does seem like it's only running on 3 now I've thought about it. After the service, MAF sensor clean, ECU reset and service it's still the same. Could an injector fault cause it to stall when idling? It doesn't do it all the time just every now and again. (No way of knowing when). The tractory rattle I mentioned is only when I'm pressing the accelerator. When I let off the noise goes. That and like The race official said the code it gave during the accelerator dance reset was no4 cylinder diesel fuel injector solenoid stuck open.
I've had a day off today because I feel like my brain could explode lol.
I really appreciate everyone's input, it is very much appreciated. I just wish I was more mechanically minded. I'm going to have to relay all this information to the garage. Don't suppose anyone can recommend a decent trustworthy place around the North East area?
 

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Job to tell to be honest it could be both injectors and scv related, a faulty scv is quite a common fault which does cause the stalling and misfire issues, forgot to say, as with suspected oil leak check the oil filler cap o ring seal is intact and not perished or split.
 

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Have you tried a hard reset, disconnect battery both leads and leave disconnected overnight to discharge fully, clean all the rocker cover of oil check the fuel lines to injectors for tightness, reconnect battery and look for oil leaks possibly from injector seals, see if noise is reduced, could also be scv problem
First of all I hope I've put this in the right place.
So I bought a 2007 2.5dci Nissan Navara Aventura with 86k miles, full service history etc.
After running it for a few days I've noticed it running as though it's missing, stalled a few times on idle and just generally sounds a bit rattley.
I've read numerous posts about injector knock, injector rattle etc so tried a forte injector cleaner first (no change), then gave it a full service and cleaned the MAF sensor ( MAF was black rotten but again no difference).
Upon servicing and blanking the egr I took the engine cover off and found it really damp like they've being spraying out (please see pics).
My question now is does it look like the injector seals have gone or the injectors themselves. I've done nemerous ECU resets after everything I've done and found 2 codes. They are 1614 which I found meant NATS Malfunction and 1271 Air/Fuel Ratio Sensor 1.
Can I take it to any garage and get them to check injectors and get them to send off for testing/refurbing or can I just buy new injectors and get the local garage to fit them.
I feel like I should also mention I'm about maxed out on my mechanical knowledge and could really use a bit of advise. Thank you in advance
Contact me on WhatsApp I will tell you what to do +21653773978
 
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