Nissan Navara ZD30

Submitted: Wednesday, Jan 30, 2008 at 09:49
ThreadID: 54032 Views:22886 Replies:9 FollowUps:10
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I have a Navara 2004 which is missing when under load. Occurred in 4th gear first then 3rd now in 2nd. Rev specific originally 1800-3000rpm. ie when turbo pumping and under load. EGR return line is caked in carbon and oil/diesel. no fault on engine computer. Injectors ok. Replaced Crank position sensor as that was only fault on ECU. Any clues?? Thanks
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Reply By: Member - Oldplodder (QLD) - Wednesday, Jan 30, 2008 at 10:08

Wednesday, Jan 30, 2008 at 10:08
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.
AnswerID: 284474

Follow Up By: citrabia - Wednesday, Jan 30, 2008 at 19:21

Wednesday, Jan 30, 2008 at 19:21
Thanks John
Yep have done fuel filter. had injectors out to be cleaned no problem.
But have got a bleep load of black gooey mess on the intake manifold from the EGR. Going to clean all of it out ( up to 5mm thick) reassemble and then try it.

Blocking EGR. HAve a waste gate turbo not the Garret vaiable pitch vanes. Anyone know if over boosting will be a problem with this turbo and if so how to limit the boost. no adjusting screw on this one.
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FollowupID: 549339

Reply By: Member - Matthew ,United Fuel- Wednesday, Jan 30, 2008 at 10:09

Wednesday, Jan 30, 2008 at 10:09
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
AnswerID: 284475

Follow Up By: citrabia - Wednesday, Jan 30, 2008 at 19:22

Wednesday, Jan 30, 2008 at 19:22
Thanks Matthew
Yep have done fuel filter. had injectors out to be cleaned no problem.
But have got a bleep load of black gooey mess on the intake manifold from the EGR. Going to clean all of it out ( up to 5mm thick) reassemble and then try it.

Blocking EGR. HAve a waste gate turbo not the Garret variable pitch vanes. Anyone know if over boosting will be a problem with this turbo and if so how to limit the boost. no adjusting screw on this one.
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FollowupID: 549340

Reply By: Russell & Mary - Wednesday, Jan 30, 2008 at 11:53

Wednesday, Jan 30, 2008 at 11:53
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.
AnswerID: 284487

Follow Up By: Member - Matthew ,United Fuel- Wednesday, Jan 30, 2008 at 19:40

Wednesday, Jan 30, 2008 at 19:40
Not sure third gear will act on the nuetral position switch.

Matt
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FollowupID: 549346

Follow Up By: phil8340 - Monday, Feb 04, 2008 at 00:57

Monday, Feb 04, 2008 at 00:57
Hi. Just looked at this reply i have the problem that me navara is loosing power in 4th now 3rd. If you push gearstick to the left the power returns, just like the turbo comes back in. Any help for this please. phil
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FollowupID: 550374

Follow Up By: Russell & Mary - Tuesday, Feb 05, 2008 at 08:56

Tuesday, Feb 05, 2008 at 08:56
Hi phil, There is a switch on the right hand side of the gearbox that plays up. Get one from your nissan dealer. There is about 3 or 4 switches but they have different connector plugs so you'll know which one to take out when you have the new one in your hand. This is it........switch assembly, neutral position..32006-23U60 now subbed to part no. 32006-23U6A. Cheers, Rus.
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FollowupID: 550718

Follow Up By: Russell & Mary - Tuesday, Feb 05, 2008 at 08:57

Tuesday, Feb 05, 2008 at 08:57
PS It will cost you about $50. Rus.
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FollowupID: 550719

Reply By: DesF - Wednesday, Jan 30, 2008 at 14:04

Wednesday, Jan 30, 2008 at 14:04
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.
AnswerID: 284517

Follow Up By: citrabia - Wednesday, Jan 30, 2008 at 19:24

Wednesday, Jan 30, 2008 at 19:24
No HT its a diesel

have done fuel filter. had injectors out to be cleaned no problem.
But have got a bleep load of black gooey mess on the intake manifold from the EGR. Going to clean all of it out ( up to 5mm thick) reassemble and then try it.

Blocking EGR.
Have a waste gate turbo not the Garret variable pitch vanes. Anyone know if over boosting will be a problem with this turbo and if so how to limit the boost. no adjusting screw on this one.
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FollowupID: 549341

Reply By: Philip A - Wednesday, Jan 30, 2008 at 15:57

Wednesday, Jan 30, 2008 at 15:57
Hmm interesting.
Dual fuel ZD30 with HT leads!
Regards Philip A
AnswerID: 284531

Follow Up By: citrabia - Wednesday, Jan 30, 2008 at 19:24

Wednesday, Jan 30, 2008 at 19:24
Yep
I dont want to buy one
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FollowupID: 549343

Reply By: Brad40 - Wednesday, Jan 30, 2008 at 17:40

Wednesday, Jan 30, 2008 at 17:40
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
AnswerID: 284549

Follow Up By: Member - Matthew ,United Fuel- Wednesday, Jan 30, 2008 at 19:38

Wednesday, Jan 30, 2008 at 19:38
Yes that is very common problem,they are VERY fine filters and if you copped a load of crap in the tank this maybe the cause also.

Matt
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FollowupID: 549345

Reply By: Member - keith P (VIC) - Wednesday, Jan 30, 2008 at 21:22

Wednesday, Jan 30, 2008 at 21:22
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
AnswerID: 284604

Follow Up By: citrabia - Thursday, Jan 31, 2008 at 07:03

Thursday, Jan 31, 2008 at 07:03
Thanks Keith
Sounds similar. lose power when under heavy acceleration. Feels like incorrect mixture more a surge when the boost decreases. Nissan deny any knowledge of a similar problem. Deny knowledge of the black gunk coming back from the EGR. Say the cylinders are glazed, wrong oil, etc. But doesn't use oil runs at up to 3150 rpm on the express way (bit more than 110kph) only ever had BP diesel plus Diesel go each tank. Guess we will just have to find it
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FollowupID: 549416

Reply By: str- Thursday, Jan 31, 2008 at 19:28

Thursday, Jan 31, 2008 at 19:28
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
AnswerID: 284788

Reply By: Chaz - Thursday, Jan 31, 2008 at 22:03

Thursday, Jan 31, 2008 at 22:03
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.
AnswerID: 284846

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