RomRaider

Hi guys, I have 350z 280hp with lot of parts (list below), I have an issue of idle when hot. Since I have put big throttle body, the revs decreases correctly up to 1600rpm, then it stays during few seconds at 1600rpm and then after it decreases slightly to 1200 rpm. I am pretty sure I have missed something in the map to fix this issue, but I am struggling a lot at this point. I am sure it is not air leak around the plenum or somewhere else as the issue came directly after putting 75mm throttle body.

I have performed all the relearns, I have changed idle map and maf factor and I also tried to change idle airflow control maps without big improvments to be honest. car is very reactive and pulls great, the weak point is this idle issue

List of engine parts:

Exhaust
- Megan racing headers
- No name test pipes
- Tomei Y pipe
- ISR Performance single exhaust

Intake
- up to now injen cold air intake but I have put now 3" Z1 race intake
- 75mm throttle body
- Kinetix velocity plenum

Fueling
- 550cc gtr injectors
- AEM 340LPH special E85 pump

Ignition
- R8 ignition coils

Additionnal info, it is CD700 software version. Let me know if you have any better idea

Ideally, it'd be a matter or adjusting some mostly undefined throttle area tables BUT an easier option that may work well enough would be to do an idle air relearn with Nissan Datascan II.

Yes I have done relearn with manual procedure or with diagzone diag tool, it doesn't improved the issue that's why I have posted here

Was it definitely an idle air volume learn and not just a clear self-learn data? I wasn't aware there was a manual procedure to do an idle air re-learn.