Crbnz33

On 14/09/2021 at 16:47, VoodooBoot said:

I am happy to report that the car has almost returned back to normal idle speed.

 

For the past week, I have been driving as much as I can, executing the idle relearn multiple times per day, after a drive.

 

At some point, I got the NDIS III Lite Android app that I put on an old phone, and I used the app to perform the procedure (though I had already performed the pedal dance 50-100 times).

It seems to me that the app is better than the pedal dance for performing the procedure. The reason is that the app runs the relearn while the engine is already running. As often reported by people experiencing the high idle/idle surge, the idle is very high when the engine is started and goes down after some time. With the engine running, my idle was initially around 1200 rpm and went down to 800-900 rpm after a few days. With the app, the idle relearn could be performed at a much lower initial idle, which I think makes a difference. Note that multiple people reported that the idle relearn procedure expects the idle to be max. 850 rpm.

 

In the mean time, I also got a new, slightly larger battery (replaced a Bosch 64 Ah with a Bosch 70 Ah, which fits just right). Not sure if this makes a difference, the old battery was 4 years old, was holding voltage, but capacity was measured to be around 60%. Alternator was diagnosed to be working correctly.

 

The idle is still not perfect. On a cold start, the car ocassionally does one or two surges (around 2500–3000 rpm) before starting to steadily go down. On a warm engine, there's a very, very slight unsmoothness in the idle. I hope this is going to smoothen out with time.

 

Thanks, all, for the support. I will report further on how the idle is behaving.

 

Hey, I’ve been having this exact issue. I am from the USA and I can’t find anything to help me for this till I came across your thread. I have a 2008 350z and in ur first video the idle is doing the EXACT same thing. I was wondering how you did the nds3 app idle relearn? I was planning on buying a code reader to do the idle relearn but looked up the app and it seems to be free. Can you explain to me how you run thru the app and how to do the relearn process 

thanks