D22 turbo or injecter problem??

nradnedge · Dec 4, 2011

Hi

I have a 52 plate Navara, when driving between 2000 - 3000 revs i have a stuttering/chugging in the acceleration. I am not sure if this is a turbo problem or a fuel pump/injecter problem. Can anyone help me with this??

I had it in the garage last week and they said it could be a fuel pump problem and it would cost about £1100 to sort out??

When driving (carefully) under 2000 revs it drives fine and i thought if it was a fuel pump/injecter problem this would happen all the time... thats what brought me onto the turbo. Dont know when the turbo kicks in but if its after 2000 revs this could be what it is as it feels a bit like turbo lagging.

Any advice would help as not sure where to go next!

Neil

mowerman · Dec 4, 2011

Its the neutral position switch, very common and an easy fix.
Do a search on here and you will find out all about it

mowerman · Dec 4, 2011

viewtopic.php?f=3&t=6867

nradnedge · Dec 4, 2011

thanks mate... i'll take a look

is this definetly the problem... i'd like to think it is something simple and not something that will cost me £1100!!

neil

mowerman · Dec 4, 2011

I would be almost certain, others more knowledgeable than me will be on to confirm soon

nradnedge · Dec 4, 2011

would this problem also cause the engine warning light to occasionally come on?

It comes on very rarely then when i turn ignition off and back on it goes

neil

pdfisher · Dec 4, 2011

mowerman said:
Its the neutral position switch, very common and an easy fix.
Do a search on here and you will find out all about it

x2 NPS quick test when driving and it starts to happen push the gear leaver to the left i should stop

wozizname · Dec 4, 2011

Neil, hi mate

All the above advice is correct however I think you need to determine your engine fitted firstly to give you the possible cause.
Your truck is a 2002 but may have the change over engine fitted :!:
It's either got the TD25Ti or YD25DDTi fitted :?:
If the TD25Ti engine is fitted I'd say it's the micro filter blocked if it's causing this 'miss/hesitation' in all gears.
If the YD25DDTi engine fitted and this 'miss/hesitation' happens in only 3rd and 4th gears then it's likely to be the NPS switch.
With the engine light coming on then it's possible that there's water in the bottom of the fuel filter being drawn into the pump or the fuel filter needs changing causing fuel starvation.
There's plenty of info on all of the the above if you do a search on this site :study:
Woz

nradnedge · Dec 5, 2011

Ok thanks pd and woz... i will try these things out.

I wes tested it today and it only seems to happen in 3rd, 4th and 5th. I will try and look into which engine it is... where would i find this info?

Neil

wozizname · Dec 5, 2011

nradnedge said:
Ok thanks pd and woz... i will try these things out.

I wes tested it today and it only seems to happen in 3rd, 4th and 5th. I will try and look into which engine it is... where would i find this info?

Neil

Did you push the gear lever over as Paul (pdfisher) told you to and did it resolve the 'missfire'?
If it did then I'd say it's defno the NPS and your truck is a D23 with the YD25DDTi engine.
Woz

nradnedge · Dec 6, 2011

Yeah woz i tried it today and pushing the lever to the side did cure the problem so i think it is the NPS, just need to try and get hold of one (Nissan says out of stock)

Also i am flat out with work right upto xmas... will this problem do more damage to the truck if i keep driving it and fix the problem at or after xmas?

Thanks for all your help... so glad i dont have to shell out for a new fuel pump!

Neil

pdfisher · Dec 6, 2011

viewtopic.php?f=3&t=6867

wozizname · Dec 6, 2011

nradnedge said:
Yeah woz i tried it today and pushing the lever to the side did cure the problem so i think it is the NPS, just need to try and get hold of one (Nissan says out of stock)

Also i am flat out with work right upto xmas... will this problem do more damage to the truck if i keep driving it and fix the problem at or after xmas?

Thanks for all your help... so glad i dont have to shell out for a new fuel pump!

Neil

Give the thread Paul (pdfisher) has put up for you a good read :thumbright:
You could unplug the switch to stop the problem until Nissan have stock of the switch and you have the time to replace it.
Do replace when you've got the switch/time because I'm sure your fast idle switch won't work and the wiring system is affected for fuel cut/idle/speed sensor settings.
Woz

pdfisher · Dec 6, 2011

Learning then master :lol: :lol: :lol: it does feel good to offer advise and get it right

When I think back a year ago and didn't have a clue it's good to give something back to new members

wozizname · Dec 7, 2011

pdfisher said:
Learning then master :lol: :lol: :lol: it does feel good to offer advise and get it right
When I think back a year ago and didn't have a clue it's good to give something back to new members

Doing a fine job there Grass-Hopper :thumbleft:
It's good to help each other out and in many cases save owners money without maindealers/garages 'fumbling' their way around our trucks.
£1100 for a new fuel pump *** :shock: and it still wouldn't have sorted the problem

ukel:
Woz

mowerman · Dec 7, 2011

Learning then master it does feel good to offer advise and get it right

well yes, yes it does! :lol:

mowerman said:
Its the neutral position switch, very common and an easy fix.
Do a search on here and you will find out all about it

chris vince · Dec 7, 2011

nradnedge said:
Yeah woz i tried it today and pushing the lever to the side did cure the problem so i think it is the NPS, just need to try and get hold of one (Nissan says out of stock)

Also i am flat out with work right upto xmas... will this problem do more damage to the truck if i keep driving it and fix the problem at or after xmas?

Neil

None of this is aimed at Neil, just for general knowledge, as NPS's seem to be a bit of a mystery?
NPS's are failing regularly now, so for anyone who doesn't know their purpose it might be as well to try to explain it?
The NPS obviously senses whether the truck is in neutral or a gear, it then sends the appropriate signal to the ECU.
1. If in neutral this allows the heat switch to raise the engine idle revs, useful to e.g. warm up the engine quicker from a cold start, work the alternator in readiness if using a winch or many spotlights, or if using the truck as the power for a jump start.
2. If in gear, and when the truck is on the over run (i.e. throttle at the idle position) e.g. slowing down for red traffic lights, junction or roundabout etc, going down a gradient etc. it sends a signal to the ECU cutting off the fuel supply.
In these instances if the NPS is missing, bypassed or disconnected the ECU does not get any signal and continues pumping diesel at the idle rate, causing an obvious waste of fuel, and reducing the engine braking effect, possibly resulting in more excessive usage of the brakes to slow the truck down, than would otherwise be needed.
So unless the NPS is working properly, eventually the unnessecary fuel wastage and truck wear, will cost more money than replacing the NPS when it fails.
So it is quite an important component for truck enjoyment, usage, economy and prolonging service component life, I hope this makes sense.
Chris

D22 turbo or injecter problem??

nradnedge

mowerman

mowerman

nradnedge

mowerman

nradnedge

pdfisher

wozizname

nradnedge

wozizname

nradnedge

pdfisher

wozizname

pdfisher

wozizname

mowerman

chris vince

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