what idle voltage do you see in Nistune for a Z32 in VL RB30

bachig24u · Post by **bachig24u** » Fri Aug 28, 2009 11:53 pm

Hi,
Just wondering what that average MAF voltage is at idle.
We have a type 1 (rev3 board) Nistune board in VL RB30NA ECU.
this one reads around 1.5volts and hits around the 4.6v at 6400rpm under around 15psi.

The ET's indicate about we are making about 270HP and I figure if I only have about 0.4 to 0.5 volts to go in the Z32MAF AFM measurement something must be wrong.

Is 1.5 volts to high for a MAF idle voltage at idle, has the 382Ohm resistor in the MAF wiring anything to do with the voltage reading?

Any help appreciated.

bachig24u · Post by **bachig24u** » Sat Aug 29, 2009 12:14 am

After much reading the manual it appears apparent that I have removed the LEGACY_AFM_OFF_SET=1500 from my original ADR file, and also reloaded the Nistune with stock VLNA maps after doing a Nistune Beta Update.

I think this would have reset something.
Do I need to tell the ECU I have a Z32AFM again so the 1500 offset is set to 0 even if Nistune stills list z32AFM as default?

This sounds more like a config error on my part the more I think about it.

Matt · Post by **Matt** » Sat Aug 29, 2009 10:38 pm

just had a look at one of my logs. I think 1.5volts sounds about right at idle (mine idles around 1000rpm right now)

about 4.1 volts @ 5200rpm

this is about right because if you look at the Z32 VQ map it takes a lot more flow from there to get into the higher voltage (its an exponential curve)

bachig24u · Post by **bachig24u** » Sun Aug 30, 2009 12:19 am

Thanks Matt. One less problem to look for.