Hello guys. I have strange problem. Some time ago after engine built I had problem with idles - they were still at about 1500 rpm. I fix it with a ridiculous settings of my iscv tables (it was the only thing that worked). Now they are exactly as set in "Desired idle rpm" table. The problem is that when I turn on the AC my car stalls or even dies. I know that this is common issue in Evo's. I've increased values in "Desired ISCV initial step position with AC on-neutral" and it helped, but again without AC my car is having high idles (again about 1500 rpm). I don't know what to think about it.

My rom is 90550001 with tephra mods.

Here are my ISCV settings. Car idles great but without AC.

 

It's really hot now in Poland

 

If you have hot cams, do the BISS setting thing in EvoScan to get the base idle speed under control. About 850 rpm for a cammy engine is ok. Then start messing with the ISCV stepper tables etc.

And do a through check for air leaks! I use a stethoscope, works a treat.