Idle Airflow with COS5 2bar SOLSD

[ferocity02]

Ever since switching to COS5 2bar SOLSD I've had a swinging idle issue only when moving in neutral. When stopped it idles fine. The problem is much worse when cold. I have it set to semi-open loop at idle. Lambda is good. 21 deg of base spark at idle. With the MAF and stock OS it idled fine.

I'd like to start by checking the idle desired airflow. Since I'm MAFless, how do I know how much airflow I need to fill in this table? With the MAF I would just log SAE.MAF vs. ECT and copy the table into the tune. But obviously I can't do that now. Any tips?

Thanks!

[joecar]

Try GM.DYNAIR.

[ferocity02]

Thanks Joe. DYNAIR seems to give reasonable numbers. But isn't this valie calculated from the VE table? So if the VE table isn't correct (due to bad injector data for example) then DYNAIR won't be correct. Is that right?

[joecar]

That means you have to first get VE corrected.