NADS issue

[BOWZER]

HI all, so i have set up my NADS on my GUII and i have blocked the EGR, Fitted the boost gauge and dawes controller, but the issue that i am having id that at high rpm my car will not get over 11psi. can any one please help me????


cheers chris

[Sir Roofy]

have you tried adjusting the dawes

[BillsGU]

Like roofy said - adjust the Dawes valve. Also, mine had a vacuum leak and that will give you that symtom. Check or even renew your hoses. They are not that expensive. Otherwise you have hooked something up incorrectly.

[BOWZER]

I have tried adjusting the Dawes vale, I don't have a needle vale tho do I need one ?

[boots]

A needle valve is not critical . What was your boost reading prior to dawes valve install ?

[threedogs]

Think you may have to stretch the spring a little if you have ran out of adjustment. Use small Stainless washers if available
better than stretching spring IMO, needs more pressure which in turn will increase your boost, EGTs will come down too

[BOWZER]

also since i blocked the egr off im using more fuel??

[threedogs]

INcrease boost, DRop over During thr Week, sort it out asap For You. Send PM

[BOWZER]

hey threedogs thanks for your help, i have just found out that my maf sensor if playing around

[mudski]

Get some MAF cleaner from Supercheap and give it a clean.

[threedogs]

X 2 with Mudski give the Maf a decent spray, make sure it dry before you replace it,

Wheres the up date???

[BOWZER]

I have tried cleaning it and hasn't changed, may be I should try again

[DSzuke]

Get some MAF cleaner from Supercheap and give it a clean.


I was after some MAF cleaner in SuperCheap yesterday but couldn't find it (no staff even to ask... surprise surprise) .

Is it actually called "MAF cleaner" or is it a generic "contact cleaner" like CRC?

Id hate to use the wrong stuff and and ruin the sensor!

[BOWZER]

its called mass air flow sensor cleaner by CRC i got mine from autobarn

[threedogs]

Or go to Jaycar they have plenty

[mudski]

hey threedogs thanks for your help, i have just found out that my maf sensor if playing around

How did you come to find its was the MAF sensor?

[BOWZER]

I went to aus4wd and they were looking over the rig, and the could only get 11psi so they tried a different maf sensor and the rig was now making 18psi

[BOWZER]

I got the new maf sensor and put it in and I'm still only getting 11psi of boost, I took out the boos sensor and cleaned it? Should I bypass the ecu from controlling the boost and have it set up as manual boost control??

[mudski]

Thats what the dawes is supposed to do. Take away the ECU control of the boost. So it mechanically controlled. Dumb question maybe but that vac line in the t-piece going away from the VNT. Which port on the vacuum solenoid is it hooked up too?
Also it looks like your dawes is screwed almost right in. Either get some washers like TD said,or, stretch the spring. Some engines just react slightly different to others.
Plus I would be making sure all the IC hoses are clamped up tight and no cracks or holes in the hoses too.

[BOWZER]

It's hooked up to the middle of the vac solinoid

[mudski]

Yeah sound to me you may have a leak somewhere then. As per your other thread. Just double check all your hose clamps and hoses. You don't want to spend $$$ on a new IC only to find out it was a hose or clamp.

[BOWZER]

I agree I don't want to spend money on parts that are not required, is there a good way to leak test the system?

[Bob]

Disconnect your Battery for a couple of hours to allow your Computer to reset.

[BOWZER]

Just in case there is a ecu error?

[Bob]

Just in case there is a ecu error?

Your ECU is self learning and will adjust for false readings from your MAF and by taking Power from the ECU it resets to Factory settings.

[BOWZER]

My speco boost gauge ended up failing, so I took it back and swaped it for a saas boost gauge now I am reading 15psi with no Dawes controller, I still have suspicion that the I/c is leaking as I wipe my finger under the end tank and get oil on my finger? Has any one built there own boost leak tester?

[threedogs]

Might be worth taking the IC off and cleaning the inside, just make sure its dry before installing again. The top RHS hose usually pops off now and again. remove that as well. Change to the blue silicon jobs. Might need a catch can unless I've missed something, how many K's it done???

[threedogs]

The vacuum solenoid should be looped off, from memory

[Sir Roofy]

My speco boost gauge ended up failing, so I took it back and swaped it for a saas boost gauge now I am reading 15psi with no Dawes controller, I still have suspicion that the I/c is leaking as I wipe my finger under the end tank and get oil on my finger? Has any one built there own boost leak tester?

take the i/c off
plug the ends with rubber plugs and putting air hose connecter in one turn on compresser place in trough or bucket with water
if blows bubbles its leaking

[threedogs]

Roofy I take it your only using a small amount of pressure??? Should be some liquid product you can swish around inside ic to seal it Oh Well.

[Sir Roofy]

Roofy I take it your only using a small amount of pressure??? Should be some liquid product you can swish around inside ic to seal it Oh Well.

there probably is mate but he,s only chacing a leak this will tell him

[BOWZER]

Thanks guys ill take it off and try that, and what do you mean about the vac line looped?

[threedogs]

All the lines are either looped off or plugged with a screw, check Chaz Yellowfoot Diagram in dawes set up he's a Guru on these matters in search engine.
By blocking these you take thinking away from ecu as you have just fitted dawes to do the thinking for you, read Chazs thread

[mudski]

If he's not using a needle valve he wont need to loop the other two vac ports. Only use the middle port for when using just the dawes. I think .hehe

[BOWZER]

Just an update the I/c is leaking a fair bit on the outlet side

[threedogs]

You'll need a fully welded one or a larger after market one depending on your needs. price wise $650 to $1300 I think.
Some are on change over basis

How soon we forget I thought all blocked except the return air hose, I'll have to re visit the archives I think

[BOWZER]

Yeh I have been looking at I/c I can get a pwr one for 450 but have to pay 780 up front and get 330 back for mine

[BOWZER]

I got the new intercooler today and installed it and still only getting 15psi boost any suggestions?
Cheers chris

[threedogs]

Now you know its not that ,it may be leak from boost line, but 15psi fine mines the same and flies, so not touching it, keep your psi safe . what are your temps???

[BOWZER]

I haven't got a egt gauge as yet

[threedogs]

15psi is fine, just that with a pillar pod or similar yoy can see whats going on under the bonnet at different times, Highly recommend

[BOWZER]

When I can afford it I'm looking at getting the autron gauges

[MEGOMONSTER]

When I can afford it I'm looking at getting the autron gauges

This what their like during the day22953
And at night
22954
Here's an action shot
22955


Never argue with an idiot, cos he'll bring you down to his level, then beat you with experience. Y2K

[BOWZER]

Looks good mate, can any one tell me how the needle valve works? Is it just a bleed valve?

[BOWZER]

Here is my 20 dollar needle valve

[BOWZER]

Issue solved made 20psi boost today