i have an 04 evo mods:

afc NEO, full turbo back, FMIC + piping, BOV, intake, manifold, 660cc injecors, 255fp, and a dual stage boost controller supposed to be pushing 18 low and 23 hi but it pushed 20 low and about 23-25 on high

the problem is that im not sure if its the tune put on the neo or what but around 5000rpm the car like stutters/bucks/holds back/looses power/misfires whatever you wanna call it. i have no clue wjat is wrong with it...ive tried foolin around with my neo, by giving it more gas from like 3000-6500, didnt do anything...the neo reads 10 flat fully opened which is rich...i dont know what to do oh and on top of that i just replaced the spark plus gapped at .026

PLEASE SOMEONE HELP ME OUT...ADVICE WHAT COULD BE WRONG IF THE SAME THING IS OR HAPPENED TO YOU PLEASE HELP ME...

 

Did you say the car was tuned or not?Did you do all the mods at the same time or over a period of time?You will probably need a good tune.One of my friends has an 03 EVO with cams and your basic bolt ons and some I think 700 cc or so injectors and he is running too rich and getting some mean fuel cut which sounds like what you may have.I don't know a great deal about tuning and such but you should have your car looked at.

 

He also has an Apexi SAFC.

 

Check for a boost leak.