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Discussion Starter · #1 ·
Morning from the US
I am a long time Safari/Patrol Owner, Ive had 5 or 6 over the years. I'm an importer in the US.
My current daily driver is a rare beast, Its a 94 Safari AD (UN Spec) NA TD42 24volt Automatic with 7,000 kms, No, seriously it has 7,000 kms.
I bought it 6 months ago, it was apparently a never delivered UN vehicle. It was driven 15kms a month and serviced every 6 months.
It is literally new in the wrapper.

Here is my problem, it starts fantastic no matter what them outside temp, glow plugs work a charm. Runs beautifully.
When the outside temp nears freezing it still starts beautifully but after 2 or 3 minutes it wantS to DIE.
If it just sitting running it will gradually start to drop rms from 900 to stall like it is running out of fuel, then a very hard restart. then feels like its running on 4 or 5 cylinders until it clears its throat. Blows lots of dark smoke while trying to get it to rev back up
If I am driving it after start it runs fine, but if i let off the throttle even at 60kms it will drop rpm's and die. If I come to a stop, same thing.
When cold it can also start to die even being driven hard at 100km/ph
ONE other Item, While it is idling and starting to die, if I depress the priming pump every 2 or 3 seconds it stays running
It takes reaching full operating temperature before it will stop acting this way.
Injection pump is also noisy
I have a second 96 Granroad TD42. It exhibits NONE of these symptoms in exact same temps, same fuel, same everything.
This is NOT a cold fuel issue

Facts
Replaced fuel filter and checked all plastic lines
Only happens when its cold outside, near or below freezing
Its done this since I got it 3 months ago at 5,500 kms
We have installed the DTS Turbo system, made no difference
I have run fuel treatment in it every fill up
Does not matter the orientation of how I park it, uphill downhill all the same
Runs absolutely beautifully and strong as an ox UNLESS I come to stop or completely lift off throttle
Once fully warmed up it has ZERO symptoms.
I have another 96 Safari with factory Turbo TD42 and his has never exhibited any similar symptoms

Any help is GREATLY appreciated and anyone that can properly diagnose it I will send a Bottle of Jack Daniels!!!

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nissan
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Does it have an ac idle up on the pump? If so you might be able to turn on ac and see if that helps by lifting the idle rpm. This could lead you to some sort of cold start device that isnt functioning properly.
 

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Discussion Starter · #3 ·
Does it have an ac idle up on the pump? If so you might be able to turn on ac and see if that helps by lifting the idle rpm. This could lead you to some sort of cold start device that isnt functioning properly.
I usually adjust the high idle to @ 1k rpms when cold, makes no difference.
Also does the same with AC on
Thanks for input!!!!
 

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Patrol Hybrid.
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Pretty sure there is a gauze filter on the banjo bolt on the fuel pump, have you had a look at that?
 
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· I Have Imaginary Friends
Patrol Hybrid.
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23,253 Posts
How about the breather vent on you fuel tank?
 

· I Have Imaginary Friends
Patrol Hybrid.
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I just don't know how that would instantly stop being an issue when the vehicle reaches operating temp? Is it somehow temperature affected?
God works in mysterious ways. Is it able to breathe when cold? Just have to rule out possibilities.
 

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God works in mysterious ways. Is it able to breathe when cold? Just have to rule out possibilities.
could bypass the fuel system by running off a jerry can to rule out breathing starvation.
I don't know if pump solenoid could cause this but I wondered? Who knows.
You can say that again, the many great mysteries of life, only God knows...

EDIT: @Paladintruck how cold are we talking, what state are you in ?
 

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Tried bypassing the filter/primer head for testing?.

I havnt really had to deal with any too cold issues. How does rubber respond to the cold?. Could the fuel lines be old and letting air into the system during cold weather?


Glow plug controller and associated temp sensor would be another one to consider. It should cycle on and off until warmed up.
 

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1989 GQ TD42 wagon
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I havnt really had to deal with any too cold issues. How does rubber respond to the cold?. Could the fuel lines be old and letting air into the system during cold weather?
I had exactly the same thought. Something is leaking air only when cold; and an old, hard fuel line that flexes enough to seal up when warm would fit the bill rather well.
 

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Is it Temp sensitive? Other than bypassing it completely to test, is there any other test method? What if I heat the assembly with a heat gun prior to starting?
All Appreciated!!!

I wouldn't of thought it would be temp sensitive but I have no experience in sub zero temps. Heat gun sounds abit hit and miss. Easy to bypass and will give a more definite answer
 
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