2010 Navarra ST ( GT ),D40 Thailand built

[Garry]

Vehicle had the air conditioning control valve fail, causing the engine head to sustain cracking,( 249,000klm ), it was towed to a repairer who supposedly specialised in Nissans, where they did an engine recondition ( new pistons, head, timing chain ), approx $6,500.
received the vehicle back after 3 weeks, then one week later vehicle lost power, towed back to repairer where I was told turbo had failed ( $1600 )
for new turbo, lasted one week, when new turbo went, towed back for new turbo at their cost, had the vehicle back for 1 & half weeks and now has gone into limp mode, tried reversing car over a short distance as suggested in other posts re transmission wind up, to no avail, any suggestions ( other than burning vehicle to ground line ) would be appreciated, at time of post I’m still wasn’t for repairer to return phone calls

 

[Old.Tony]

Doesn't sound like a lot of fun.

Transmission windup can only occur in 4WD mode. Make sure it's in 2WD (2HI). You might want to move the car around a bit (left, right steering, forward, reverse, multiples of these) if the little display in the bottom left of the instrument panel doesn't have only two wheels blacked out.

There are a couple of things that could cause limp mode. If it's 'real' limp mode (enforced by the ECU), you'll be limited to 2,000rpm. If it's not - if it's just feeling very sluggish and hasn't got the power it should have - it might just be a turbocharger control issue. Might only be a hardened or cracked vacuum line. It might also be the SCV - but let's look at turbo first, because this one's cheap.

There's a small black hose that runs from the vehicle right hand side, across the top of the motor and down to the Boost Control Solenoid (BCS) that's normally mounted on the intercooler hard pipe. Disconnect this hose from the BCS and connect it directly to the turbocharger actuator. Close bonnet, take the car for a drive.

If things improved a great deal, you may just have a vacuum leak, or a faulty BCS. Replace all the vac hoses (3.00mm inside diameter vac hosing, you'll need about 3m of it, a good pair of cutters and about an hour of your time). Try it again and see what happens.

 

[Garry]

Had the vehicle back and still very sluggish, bit the bullet and called in a mobile mechanic, after trying a few different things to no avail car was towed to his workshop where the DPF filter was removed and inspected, it was that blocked with carbon deposits you couldn’t shine a torch through it, even though they claimed it had been removed and soaked for two days to remove the carbon, $1500 dollars later and car was up and running, one week later on my way to work and bang the turbo has blown ( 2nd one fitted by initial repairer ), currently back in mobile mechanic’s workshop to find out if blown turbo was a cheap after market Chinese one, even though I was charged $1100 for a genuine turbo by the dodgy brothers, looks like a call to dept of fair trading regarding faulty components and repairs

 

[Old.Tony]

Sounds like a bad run there, here's hoping they fix it and it runs for a long time without issue!