Nistune Forums

The HCR32 ECU uses the FPCM to lower pump voltage when TPS is 'ON'.
Make sure TPS light is not flicking on and off.

Have you tested the signal and power to cold start valve?

spray pattern changes with fuel pressure so no big deal... BUT... flow matching is critical along side the operating fuel pressure pattern delta as you mentioned. Some injectors just don't suit the manifold angles or port design after a flow modification. Uncontrollable mixtures in certain load/rpm ...

Best take the injectors out and get them flow tested.

I haven't seen a set yet that would pass as a matched set.

I'm guessing it's either really cold where you are or the cooling system thermostat is stuck open or missing, maybe an air pocket etc. The ignition timing isn't advancing vs coolant temperature. The log wasn't really long enough to see the engine get to operating temps. What size/cc injectors are in...

The fuel mixture isn't likely to be causing the rough cold idle.

post the bin and we can have a look. if you have a log of warm up it will help.

Post the tune bin file. Let's have a look.

can't have Logworks running. go to 'configuration' in nistune and select 'innovate mts' from 'wideband type' may have to find out what 'com port' the LC2 is using and select in nistune also. 6th or 7th button from the right (have a 1 or 2 written in the image of the button) will be green when wideba...

ok thanks, I'll have a look at logworks. as for the "make selection" ; you answered it by explaining how logplayer fills the drop down lists. instead of resetting, have a 'none' data stream choice such as "make a selection" as there is no point having multiples of the same data s...

Hi Matt, Innovate uses same names for some data streams such as RPM as does NIStune use the RPM. The Innovate RPM can be chosen by default when playing back logs which is really strange. Each time log player is started it appears to loose all log player selections. Can NIStune save the selected drop...

yeah true, Could be the same service manual that states the timing belt should have a 54 tooth count between gear markers..

Yeah, it's only ever simultaneous or odd/even injector groups. it's hard wired.
Try changing the temp value or temp chart in software, it should do the same.

sounds like a fuel regulation problem or non nissan MAF.

what model number of fuel pressure regulator?

I've noticed similar issue and found that changing TIM back to default and going old school K methods... The problem is worse with this model skyline because the fuel pump controller module plays a huge part in TPS "ON" mixtures. If you haven't bypassed FPCM module the problem is almost im...

Yeah, confirmed. looks like a soft Bug. if you don't choose half value GTR tick box it works fine. reports MAF correctly. choose tick box half value and Nistune doesn't pickup the MAF table as anything regardless of MAF choice. Nistune doesn't detect the MAF. It looks for a comparision of the MAF ta...