Poo heap Land Crusher problem

Hi Richard,
The turbo cuts out for a few seconds. The turbo on most cars is controlled by manifold vacumm.

On Patrol

I would have thought the turbo is a compressor so it will be a positive pressure at the manifold inlet, the only vacuum will be at the turbo inlet i.e. air filter.

I would (maybe) agree with waste gate setting, maybe opening at a lower pressure than it should be.

Or it sound like turbo lag? maybe computer is not keeping fuel up to the engine?

Just a thought

Richard

agreed, I was led to beleive that a turbo diesel does not produce vaccum, hence the need for those expensive alternators that have the vacuum attachment to control the brake booster.

damn those expensive alternators, damn them...

Mine did/does the same. Towing and under load (uphill/headwind etc) not always severe load power is lost and foot off the accelerator and then back on and power is restored but momentum lost which is frustrating. Once on the Bellbird hill in East Gippsland it did it 5 times until I got to the top. That was about 120,000 kms ago but then it went to the dealer and they said "Nothing wrong with it". I took it back again with the van on the back and they still said nothing wrong with it and I will admit that the bloody thing would not do it. Eventually they changed the computer and I thought it had fixed it but it hasn't. Lately the engine required rebuilding and it is still there. I have learn't to live with it and find that if it is not on full throttle the event does not occur. I wonder if it is a sensor that says " You're pushing me too hard so I'm reducing the available power to you for a while" as thats what it feels like.
There have been a few others with this problem. In a 4x4 mag a couple of years ago one of the featured vehicles had the same thing. Buggerd if I know anyway. My vehicle has had almost everything replaced or repaired and it still does it.

Notso
Was that in a patrol, and was that just under extreme power only? as mine is.

Yep, Patrol GU11 2000 build.

Happened when under acceleration going uphill usually, not necessarily extreme, but reasonable pedal pressure.

The dealer had to run some tests and send off graphs and charts to Nissan. They sent up a new computer overnight more or less as it was quite dangerous if I was in traffic.

Ed you were right. Well done. There was no problem with the MAF sensor in fact it was sencing a faulty air filter. They put a new filter on the car when fitting the snorkel, but it was a cheepy filter, and when we replaced it with a good brand one, problem solved. Runs like a dream now.

Now that you mention it......

I was going to ask "how's your air filter?", but since you'd mentioned that you'd had a snorkel fitted, I assumed that the filter would have been checked/cleaned/replaced (whatever??)...
So what is the "good brand one" that ya replaced it with?? (and what brand was the "cheepy"??)....

Glad ya got it sorted:-))

Hi Ed
The good one is a "Wesfil" a filter made in NZ, they make filters for the Heavy Duty market mostly.

God only knows the cheepy one's brand name, I said Chinese but that was just a derogatory remark for a filter that some auto shop buys for $2.50 a dozen and sells for $50.00 each.

The panel beater that fitted my Genuine Nissan snorkel for me just got one from his local auto spares and put it in for me, thinking he was doing me a favour. He will now only use reputable filters, was his reply to my issue.

On Patrol

Hi Donks
You and Ed you were right. Well done. There was no problem with the MAF sensor in fact it was sencing a faulty air filter. They put a new filter on the car when fitting the snorkel, but it was a cheepy filter, and when we replaced it with a good brand one, problem solved. Runs like a dream now.

Agree with 3.0turbob
Get the fault codes read.
You don't have to go to Nissan, try local mechs and auto sparkies.
I have the codes and I am only a general automotive repairer. They are becomming readily available for the average bloke lately. The book I got mine in cost me 300 dollars so it is only fair to say larger types of repairers are likely to have them and auto sparkies should all have them.
Hope this helps.
If you need more help email me at l o n a r d s a t b i g p o n d d o t n e t d o t a u and I can ring you. I will be back in the workshop tomorrow, Friday after lunch.
Hope this helps
120scruiser