Rb25 - Z32 Nistune Ecu - Vtc Not Working :(

[kubus]

hi there guys.

i just bought a z32 ECU - with nistune board - for my RB25det ( s13 conversion ).

all works perfect - but the vtc... it's not working :( with stock RB25 ECU it works fine.

can't figure it out.

what could cause that problem ?? any idea's ??

cheers guys.

[Guilt-Toy]

how do you know the vct is not working?

[The Dan]

Have you checked for power at the solenoid up the front?

Also, you can turn VCT on at idle and it should change revs noticably. Use the nistune software to do this, its an easy test

[kubus]

how do you know the vct is not working?

when revving U can easily hear it "click" - from under the hood.

when stock ECU connected it works fine - dyno all fine

with z32 nistune board plugged in - it does not click and it's like 100Nm loss :(

Have you checked for power at the solenoid up the front?

Also, you can turn VCT on at idle and it should change revs noticably. Use the nistune software to do this, its an easy test

the power should be there ( on stock ECU it is ) ; ( it's triggered by negative from ECU )

how can i turn the vct on with nistune software ?? i'm new to nistune .....

[The Dan]

should be there

^^This

Fix it so it reads correctly. That sounds awfully similar to - "I assume it does"

[paulr33]

i know you say it works on the stock ecu and not on the z32 nistune board

just check you have a working NTR switch, from memory, VCT (at least on the stock ecu) wont fire in neutral, the car must be in gear (clutch in)

[kubus]

never had problems with that - it was always cutting in when parked revving ( by hand from under the hood ).

none of the gearbox sensors connected - speed / reverse etc.

last time i checked - it was powered - by typing "should be there" i ment - it was there like an hour ago - last time i checked no worries mate - i got your point

but it still doesn't work :(

[DVS JEZ]

So it worked with z32 ecu when u first fitted it? Or only with the stock ecu?

[On Edge]

I'm confused, what needs to be done for it to run with z32 nistune?

Should it click on idle in neutral?

[Kenna802]

I didnt think it worked with the z32 board

[kubus]

it works with stock ecu

it doesn't work with z32 ecu

[Rolls]

I didnt think it worked with the z32 board

The whole point of using the Z32 board over the rb20det ecu is it has VCT control.

[On Edge]

The whole point of using the Z32 board over the rb20det ecu is it has VCT control.

Exactly, so how do I know it works?

[DVS JEZ]

Think pin 113 in the ecu is VTC control power, check this with a test light when rpm is above 1500.

But as the guys said above if the ecu doesnt get all the signals required (speed and neutral/clutch switch) than it wont activate the solenoid.

Because u said dont have a speedo in ur s13 u should be able to go into nistune and set the minimum speed for vtc at 0 and try it

[kubus]

yeah - it is pin 113 - and no - there is no negative coming out of it :(

i can't see the option - " minimum speed for vtc " - only MAXIMUM hmmmmm

PS. Neutral switch - if not connected - the ECU thinks it's on gear all the time right ??

Edited October 22, 2011 by kubus

[On Edge]

Where do I find this switch?

[Rolls]

post on the nistune forums or email them, they would be able to give you a better answer.

[DVS JEZ]

yeah - it is pin 113 - and no - there is no negative coming out of it :(

i can't see the option - " minimum speed for vtc " - only MAXIMUM hmmmmm

PS. Neutral switch - if not connected - the ECU thinks it's on gear all the time right ??

i thought pin 113 is a positive?

[Rolls]

With the VCT it is wired permanently to +12v and it switches the ground, at least that is how I thought it worked.

[On Edge]

Does it need to make that clicking noise when revving on idle to ensure it is working?