Truckster (Vic) replied:

Air flow sensor...?

Member - Captain (WA) replied:

Hi Wheats,

As you have a manual, the only way to have the problem you describe is for clutch slippage. If the chain drive in the transfer case was slipping, would only be an issue of in 4WD, not the case here. But you have done the obvious test here and seemed to have ruled that out.

Except if the tacho was wrong! Since its an electronic tacho, its "possible" that it was an electronic error if the ECU had a glitch. This would account for reduced road speed but indicated engine reves increase.

Did your engine fault light come on? The problem sounds much more like an airflow meter issue, but the engine light should come on if that was the case.

Would not be suprised if Nissan cannot replicate the problem, but they should be able to check the fault codes in the ECU, hopefully something will show up here.

Sorry not to be more helpful, but your problem as described is not typical.

Cheers

Captain

wheats replied:

Thanks heaps for the responses.

Firstly no engine warning lights came on, and the problem is now constant(vehicle is now with the trusty nissan dealer) as for faulty tacho I dont think so as there was an audible increase in engine revs, the engine runs ok at idle and at cruise.
The only explanation is a slipping clutch, but there are no other signs of wear . I would expect to smell the burning of the clutch after the amount of slipping that occurred.
Im no expert on clutch's or gear boxes but after 10 years in the heavy transport industry I hope I would recognise the smell and sensation of a slipping clutch,
I may well be wrong.
If so has any one else had an experience with a faulty clutch at such low kms 30126kms.
I appreciate the input from all.

muzzimbidgie replied:

You may not smell the clutch if it only slips every now and then.

wheats replied:

Im 100% certain that Im the only driver since day one of ownership and I would say I treat the vehicle properly as it cost a lot of money and I rely on it.
As for smelling the clutch I can tell you that there was enough slippage there to cause a bomb fire, and I didnt continue driving out of neglect only to safely get off the highway.

As of today nissan have had the vehicle in the workshop for four hours(supposedly) and cannot find the fault. I dont think they have even looked at it yet so tommorrow might tell some stories, I will post the NISSAN verdict.

Thanks again for the input.

wheats replied:

Well another 8 hours in the workshop with the Nissan blokes scratching their heads, Latest assumption is that all evidence leads to the turbo but after 8 hours not quite sure will have to run further tests to confirm.
What a load of crap these guys have got to be kidding, has anyone else had same troubles with nissan service or lack of it???
How many tests can be run? either the turbo is working or isnt, a simple boost gauge would do the trick. Im off to nissan early am tommorrow for a surprise visit. Im certain they are searching high and low for a reason to put the problem onto me and so not to warrant the issue.