[Skylinedan 1]

Idle quality is really a matter of tuning, I,ve written tunes that were smooth as glass, and the next one idles like an old diesel. Fueling will play into the idle, as will timing.

 

[Skylinedan 1]

I bump my idle up to around 620 625, seems to do the trick with the lumpy stock idle at 600 being a bit to low maybe. It also depends on how warm the engine is, morning starts seem to be the worse, but after that it think its pretty smooth

 

[Skylinedan 1]

Mine started doing it a few weeks ago, figure I'll have to chase one down before it gets really bad ,and starts hard after filling up like my 13 did.