I have an Evo V (CP9A) MAF being used with an Evo VIII ECU. Do I need to change the MAF size setting on ECUflash? Currently it says 357.5 g/s. Also would scaling or compensation need adjustment?

Thanks!

 

No, because the difference is negligible, I never had to change the values when using 7/8 ECU's on a CP9A.
Maf size is 356 in case you still want to change it.

 

Thank you so much for the response! I guess I can scratch that MAF off my list of culprits. I've been scratching my head as to why my idle is so high with this setup. No boost leaks, new ISCV, new BISS screw/o-ring, lowered idle settings with Evoscan. At idle the isc steps is at 0 (fully closed) and the BISS is all they way in, and my idle is still around 2,500 RPM's.

Have you expirienced any issues controlling the Evo V ISCV with an Evo 8 ECU? I know they are different. When I try to enable the speed adjustment setting with Evoscan nothing happens.

 

What's your TPS % at idle?
I never had such issue with a CP9A/later ECU. I currently have a different idle related issue with an Evo 6 with an E7 ECU. The car keeps stalling post high revs. I'm going to attempt to fix it by adjust the biss screw & do a base idle reset.
I suggest you do the same procedure, it might fix your problem.

 

TPS is showing 15.2 on EvoScan. The BISS screw is currently all the way in right now.