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Hi, i got few question about how to get good idle b series engine. There a lot of thread tell solution for bad idle. But this is not iacv or fits, With original stock ecu, idle is good..after chipping and used some bin file, idle surging high and low rpm.
What method features related to idle tuning in < C R O M E >?

Let say i have b16a idle good with stock p30-000 ecu, but after add chip with new basemap idle goto low and high between 300-1500 rpm. Not get any info through wiki or google.. for sure i dont think it related to iacv adjustment, because it ok with stock ecu. hmm

In the low cam timing at 1000 RPM columns 1-4 take them down to 16.5 degrees timing. That should take care of it, but you can fine tune it with the IAVC slider.

Thank Dweezil, it work since i try adjust it from 17.00 to 16.5, idle go pretty nice.. help me understand what it used for

I'm really not sure why it does that, I found that here when i was having problems with a P30 based map and all I know is it works. My only guess is that it has something to do with the base timing at that engine speed and load levels where you don't need to be adding more timing.

is this trick specifically for b series?