Nissan Navara ZD30

I always start with the simple bits first.

Fuel filter partially blocked?

Found in my pajero that in that rev range it would loose power, above it went into overfueling mode so didn't notice it as much unless I held the revs for a while.

Sounds to me like the PSG is u/s,basically the pump will need to come off.

HAve you done fuel filters,blocked off EGR etc.Try the simple things first.

Matt

Hi. Try this for me. Go for a drive and while in third gear hold the gear stick to the left or right and see if this helps.Post a reply later and let me know if there was a difference in power. Rus.

Hi . 2004 sounds a bit young for this suggestion , but if you have a crook HT lead(s) , it will cause the same problem.
Usually the misses are quick and sharp where fuel problems are usually slower and longer,
Cheers Des.

Hmm interesting.
Dual fuel ZD30 with HT leads!
Regards Philip A

i recently had a similar problem with my turbo diesel courier whilst 800ks from home , it just woundnt rev over 2000rpm. after much head scratching i got some advice from "United Fuel Injection " in perth. (many thanks to them )
I removed the fuel intake at the injector pump ,with the banjo bolt removed i the found a spring with a very fine mesh basket filter inserted in the intake ,with the help of a bit of wire bent into a hook i got it out .it was chokkas full of crap & you couldnt see through it . i used a can of bushman repellent to pressure clean it from the outside in. put it back together & now runs better than ever .
I dont know if the nav is the same but might be worth a look.
good luck ..
brad

recently traded my patrol ZD30, when traveling with the van on the back i would intermittently loose power. usually when overtaking or climbing hills. after talking to Nissan they told me that this problem is usually caused by the turbo failing and they would replace it but could not guarantee that it was the problem. i was told that after replacing the turbo if the problem still occurred they would replace the solenoids that control the boost. each part costing in excess of $3000. but they still could not assure me that would fix the problem, as it could also be the ecu. needles to say i traded it in on a 4.2td patrol.
Keith

Hi there, just thought id add some info to help.
have a read of some of the stuff on Nissan-navara . net. the guys may be able to help you out as well. They have helped me here or there with things on my str. Tim

Hi Citrabia,

Just on the filthy black grease in your intake manifold – it’s the result of excessive EGR and crankcase blowby oil entering the turbo. I strongly suggest you at least fit a blowby oil catch can. Mine catches on average around 10ml every month of crankcase blowby oil that would otherwise make it’s way into the inlet manifold and mix with EGR to form that thick black greasy paste that’s good at blocking the inlet runners.
After blocking my EGR and fitting an Air/Oil Separator, my inlet is relatively clean.



You can fit a manual boost controller to limit your boost to wherever you want it. I have a Dawes valve and manual controller fitted to mine to limit my boost. I rarely see over 10psi on the boost gauge, but I have a VNT which is a little harder to control. Having a waste gate, you can fit a Turbosmart Boost Tee or a Dawes Controller to manage your boost. ZD30 Navara’s can boost to over 25psi at full throttle, but keeping to a maximum of 15 or 16psi won’t hurt power, but increase the engines life.