Install an older model profec EBC. Everything is set up good. I have the turbo to the In and the out to the wastegate. I unplugged both hoses from the stock silonoid, but kept it plugged in, capts off the hose from the maf.

heres the problem. On high setting: 20 PSI to redline when I floor it in either 3rd or 4th, my car jerks forward violently and makes a stutering air noise as if it is not getting air or air is trying to shoot out of something. Checked all hoses, everything is snug and tight. Double checked to make sure install was done right. It seems perfect. On low setting around stock. everything works good and I can go through the gears without any problems


Mods are:
EBC
recirc BOV
AFC
Cone filter.


Any advice?

 

Are you possibly hitting fuel cut off. I was reading your previous post about turning up the boost and only running 91 octane. That sounds like fuel cut off especially if you are going full throttle all the way up to redline. Try to get your ECU re-mapped.