Nistune Forums

It will be a 'theoretical' calculation only So you can adjust from old MAF to current MAF, and it will use the new calibration curve, and an estimated K constant adjustment based on flow change between MAFs Similar with injectors, change from old CC to new CC, and percentage adjustment to TIM / K co...

Might need to check your ECU part number

Z31 26Pxx model has the following code lines instead. See attachments

2F37/2F38 is what we need to adjust (there is a 0x8000 offset from AF37/AF38)

Did some digging. Looks like target idle activation. RPM drops to 875 rpm which matches 50degC and then it kicks in to bring the RPMs high (a bit on the high side)

Nice pics!

I've just written in the other thread in this Type 3/4/5 area about TPS idle. Have a read of that. Basically make sure TPS is not undershooting on decel and then returning to TPS value above this after undershoot.

So lowest recorded TPS value is the new 'TPS idle' value

TPS could be an issue. When you crank, it records the TPS voltage (for idle position). If your TPS opens and then closes, and goes below this value (undershoot), then a new idle TPS position is recorded. We have seen some cases where if TPS snaps shut, it undershoots and returns after to 'normal' po...

We can update the ENT file and 'hard patch' the ECU code changing addresses: Hex: 0200 value: A9CF: 02 A9D0: 00 Lowering this say by half (0100) will result in shorter cuts. FYI Trying to patch the code otherwise would be a bit complicated. You could try the hex editor built in Display > Hex Editor ...

Interesting one. Double check your FICD (fast idle control device) is clicking on/off with the air cond relay. I think it is, since RPMs are holding whilst AC compressor is on I will note that you are running a bit lean at idle regardless (15.5 AFR on average). So you could try increasing latency a ...

I've had a look through and nothing unusual from what I can tell. On decel where it goes lean, the load cuts (showing injection time as latency)

Normally this happens between TP cut and TP recover

Then it goes back to a non-cut situation and you see the AFRs return to normal afterwards

When you decel, it will do two things 1. When TPS idle set, it will use idle timing. The spike you see is it going between idle/not idle 2. The 'MAX load (TP) Decel' table is used for antistall. If you find it is going lean too quick increase the load numbers I've uploaded 1.4.6 today which fixes an...

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Do you have details of the crashing? Is it blue screen, or is the software locking up/ freezing or does it shutdown? Which version are you running? 1.4.5? If you can grab a debug log I can have a look. Nistune should be taking the number reported and displaying the same (there is a lambda option too...

What do the cut counters actually count? And is the TP cut table not in effect when the boost cut table is active on the NEO ECU? Or do they work simultaneously? Cut counters are not documented by Nissan but they appear to be time based, depending how long it has been since the voltage exceeded the...

Neither image you posted shows a 'cut' When you get a cut you will get a sudden drop in injection time. We are not seeing this here. What we are seeing is a short (first image) or medium (second image) drop in everything. Check to see if it is leaning out. Could be other factors, like AFRs going lea...

Check the TPS idle indicator (post a log here if you need someone to look at it). The TPS idle should be active when the TPS idle line is triggered. For RB25DET in R32 RB20DET the TPS idle indicator should be triggered using the FP1/FP1.1 firmware by setting the "TPS idle trigger" paramete...