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Hi,

This account is new to the forum as I can't get into my other account, it was tied to Facebook and when I changed my email it won't let me login anymore (with FB that is).

My truck is a 2007 Navara D40 RX 2.5L (VSK), I've owned it for 3 years, it had a 2013 YD25 engine put in it right before it was in my possession.

So I've been trying to diagnose some running issues, namely random stalling that leads to a crank no start and a after a random amount of time it will just start.

I've ordered a new throttle body as every time it happens I get a P1705 TPS code.

Another issue I've noticed is I have a minor fluctuating idle of about 100 rpms, especially when it's cold but a lot of the time it's always there, this is minor but worth mentioning.

Fuel pressure max was about 120,000kpa after a 5 minute drive around town, when key is turned to IGN with engine off the absolute throttle position is to spec at 8/8, haven't been able to test when the stall happens as of yet.

Below pics are sitting idle after a 10min~ drive.
View attachment 66826

View attachment 66827

It can sit there running for 10mins straight without the temperature gauge rising at all until I start driving.

I've cleaned the TPS plug, Accelerator Pedal Sensor, MAFS, Replaced the Fuel Filter and replaced the Air Filter, took off the Intake hose to the TB and it was clean as a whistle. ECU reset done also after Fuel Filter replacement.

I also did a 20 minute drive the other day and no events occurred, I will be using it a lot for work soon so I need to make sure it's reliable.

I'm not sure if cleaning the TPS plug temporarily remedied the issue, it's very dangerous when it stalls at high speed on the freeway, so I do need to identify the problem, especially since I'm gonna be towing a trailer soon.

Unrelated to the main problem but can anyone tell me what the green plug is in the pic below? Just curious as to what it is/was for lol
View attachment 66828

Thanks all.
Si
Welcome to the forum.

P1705 means the throttle position sensor is playing up. It is the potentiometer on the throttle pedal that normally causes the problem. I think the normal remedy is to buy a new throttle pedal with the position sensor.

I think that would also cause the uneven idling and maybe the stalling too.

No sure what the green plug is for, it might be for the "water in fuel" sensor on the fuel filter fitted in some markets. The same loom is used for RHD LHD, petrol, diesel so there are several unused plugs.
 

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Good news your problem is sorted.

You are spot on on the engine. The replacement is a Thai build (MNT) which has 128kw.

As far as I am aware the mechanical parts of the engine are identical with the added benefit of having the Japanese timing chain rather than the French one (same spec, just better made)
 
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