GU ZD30 DI NADS Help

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Originally Posted by threedogs

Mine is an auto and sits on about 12 @ 100kph,, max boost is around 20 psi.

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Hmm maybe I have it wrong, did read others saying the auto was really hard to get the same boost levels as the manuals at 100 kph(10-12psi), due to the differences in the rpm that each are at while cruising at 100 kph.

I can only get 14psi max boost without going into limp mode, so maybe that has something to do with it also, and not sure if you have a torque converter lockup mod and if that would change the psi readings as engine revving higher 100kph or if the DP chip helps with higher boost levels?

Is your EGR blocked. Transmission is stock no mods as my Auto guy advised not to do it with a daily driver.
IMO my Patrol fly's I know it blows 3ltr Hilux's to the weeds[late models]

Yes EGR is blocked, kinda thought that when I did block it that it is what made my limp mode problems above 14psi boost? but figured the benefits outweighed than not doing it?

You may have other problems causing the limp mode.
have you disconnected the battery to re-set the ECU
Just doesn't sound right , wait till Mudski comes on board
he may be able to diagnose it better,
have you fitted a needle valve ?
Go easy stretching the spring its a bit harder to "un" stretch.
some times SS washers are more accurate

Yes re set ECU a few times, changed MAFs, been testing and testing, tinkering and making small changes, been keeping the allen key for the needle valve and a couple of open ended spanners for dawes valve to make adjustments, kinda think its running pretty good at 14psi and spooling up around 1600rpm, ended up at 14psi after doing some late night cold air runs as noticed that seemed to make a difference, for example on a warmer day could run higher boost but would hit limp with those higher boost levels at night when air temp was colder, so decided to set it up for cooler air temps and seemed to work.

EGT's seem good at 330-350c at 100kph on flat road with cruise on and can rise and drop from there pending hills, seems to be running well now and reasonable power for a 3L(a lot better than the ZD30 in the 03 Navara), fuel economy is around the 12L-100km's with mixture of town and highway driving and just returned today after filling up 12.42L per 100k's with 50% town 40% highway and 10% 4wd driving from full tanks including Sub tank to only a quarter left in main, which was better than I thought it would be.

To be honest I don't think I can get it running any better unless I do further mods like the HPD airbox lid and MAF housing or chip and am pretty happy with where it is at atm, although in comparison it seems there could be room for improvement but also a little done with it and at the stage where I'm just enjoying driving it.

each set up is different as you know, just enjoy as it is. if in doubt go get it Dynoed.
But would hate to get a Dyno and find out I was half a turn off max performance GGRRrrrrrr

Have you checked your intercooler for leaks? Oil deposits on the underside of the ic is a tell tale sign of leaks. Might not be the issue but worth a check. The oem ic's are hopeless and known to leak.

Ok so bit of a late update. I have fitted the needle valve but still have issues. if I fiddle with the needle valve I can get it to boost up to 15-20 but quicker than wanted. As soon as it hits a decent boost level like 15+psi it immediately drops to back to 10 and that's it. At 2800 rpm im still at 5psi and get to 10 at about 3500 so it goes back to the same issues as if the needle valve isn't connected...... Whats happening????? Whats the best way to test the spool up with the needle valve in an auto?
Heres a few pics of my slapped together install to try and see why I have issues
http://i100.photobucket.com/albums/m...230_210935.jpg
http://i100.photobucket.com/albums/m...230_210951.jpg
http://i100.photobucket.com/albums/m...230_211001.jpg
http://i100.photobucket.com/albums/m...230_211009.jpg

The second pic doesnt look right. Can you tell me where the vac line with the dampener on it is coming from?

Comes from the vac pump. Right side of tee as you look at is is from the needle valve and the left side goes to dawes