Navara D22 ST-R throttle unresponsive

Submitted: Saturday, Jan 25, 2014 at 19:07
ThreadID: 105950 Views:7696 Replies:6 FollowUps:3
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Hi All,

My Navara D22 ST-R 3.0 Di (5-speed manual) has performed flawlessly for 9 years. However today (first time driven in rain for months) I experienced an engine power problem. The best way I can describe it is that when I press the accelerator nothing happens, the engine isn't rough and isn't missing but it just seems to stay at idle. Once when it happened I rolled into a car park and saw the engine was idling fine at 750 rpm when I was asking for throttle. It has happened in almost every gear including 5th. Towards the end of the drive home I worked out that if I quickly pumped the accelerator when it was happening it would pick up and go.

Could it be a problem with a throttle sensor? Has anyone else experienced or heard of a similar problem?

Cheers,
Rob
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Reply By: member - mazcan - Saturday, Jan 25, 2014 at 21:01

Saturday, Jan 25, 2014 at 21:01
hi
is it a cable throttle or drive by wire electronic
don't have answer but suggest you try the navara forum
I'm sure someone on there will be able to give you relevant imfo cheers
AnswerID: 525121

Reply By: Patrol22 - Saturday, Jan 25, 2014 at 21:39

Saturday, Jan 25, 2014 at 21:39
This is what is commonly referred to a "limp mode". The ECU has received a signal from somewhere; it could be fuel pressure, vacuum or any number of things. Might even be a dirty MAF sensor. I would recommend you go over to the Navara Forum and ask this question.
AnswerID: 525123

Follow Up By: Shaker - Sunday, Jan 26, 2014 at 18:38

Sunday, Jan 26, 2014 at 18:38
Wouldn't the engine fault light come on is if it was in limp home mode?
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FollowupID: 807035

Follow Up By: Patrol22 - Sunday, Jan 26, 2014 at 18:49

Sunday, Jan 26, 2014 at 18:49
Not necessarily. If it is an ECU problem the light will definitely come on but if it is say a loose connection on the neutral switch on the gearbox or to one of the injectors it may not. Certainly doesn't come on in my D40.
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FollowupID: 807036

Follow Up By: Hoyks - Monday, Jan 27, 2014 at 10:44

Monday, Jan 27, 2014 at 10:44
Sounds very much like a dirty/failed MAF sensor. I had a Terrano II that behaved in a similar way.
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FollowupID: 807068

Reply By: Member - RobnJane(VIC) - Sunday, Jan 26, 2014 at 08:49

Sunday, Jan 26, 2014 at 08:49
Hi Rob,

We had very simialr symptoms in a D22 we had a couple of years ago and after a bit of searching we found the transmission has a neutral switch which ensures engine speed returns to idle between gear changes, this had 'failed' and meant that in all gears the engine would only perform as to 'limp mode' levels. So, very restricted power.

Seperately we also experienced a split turbo to inlet manifold hose, but that was simply a loss of boost, but strangely no turbo whistle to indicate a split hose.

Needed to have the Dealer finalize the diagnosis of the neutral switch.

I hope this is helpful.

Rgds,

Rob P
RobnJane

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AnswerID: 525141

Reply By: Member - Rob B (QLD) - Sunday, Jan 26, 2014 at 09:45

Sunday, Jan 26, 2014 at 09:45
Hi All,

Thanks for your replies. I have posted to a couple of "Navara" forums. Also I will track down someone who can read the computer info on Tuesday - hopefully the ECU will tell us what is going wrong..

Cheers,
Rob
AnswerID: 525142

Reply By: Villatranquilla - Sunday, Jan 26, 2014 at 14:29

Sunday, Jan 26, 2014 at 14:29
sounds like the same problem we had (same vehicle 2006 model, 45,000 k's and just out of warranty as we had bought it second hand) . Nissan were sure it was a fuel problem and after 3 weeks and $2700 we were told the fuel pump needed re-calibrating.
Have been told since that to fix the problem you take both battery leads off, turn ignition on,(this drains all power out of the system) leave it for at least 10 mins, then turn ignition off, reconnect battery. Take it for a drive and computer should re-set fuel pump. Two people have told us this - 1 was a Nissan mechanic.
AnswerID: 525159

Reply By: bigcol - Monday, Jan 27, 2014 at 22:30

Monday, Jan 27, 2014 at 22:30
Nissans own diagnostic equipment will not show a code for a faulty neutral switch on top of the gearbox.

I had it fail on me in 2008 when I had a D22 STR.
One way to find if it is playing up is to push the gear stick either away or pull it to you.
Can't remember which way.
If it's the neutral switch it will either get better or worse depending on which way you pull or push.
The only way that won't work if is the switch has failed completely.

Try this before spending any money
AnswerID: 525239

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