Hi , I got a EVO 8, I Install a GT35. I got a great setup with my reflash, but when the car is in neutral , an I accelerate the engine about 5000RPM, then the RPM's goes down, then I got a drop about 500RPM for like 5 second, then idle gets normal.

The question is, When in the reflash can set better this issue? If any of you guys got the right setting for this?
Thanks !

 

Are you running cams at all??

 

you need to give more info.... type of turbo (who's) , type and size of injectors, who did your reflash etc.

 

blow off valve?

 

I second this...

We need your entire mod list to determine any type of faults that can cause this.