ok, ive been driving my car recently and its been acting perfect. but earlier this night, after i left a freinds house my car does not run correctly.which is odd because all day today up until then was fine. the problem is that it wil only rev up to 2500-3000 rpms. and if i try to accelerate past that rpm it will backfire and sputter heavily? from what i could see seems like all vac lines were intact and tight, could it be a posible vaccumm leak? as for what is done to my car, i have apex power fc, non-sequential turbos, greddy profec b2 boost cont., as for ignition i have 9s for both the leading and trailing spark plugs, fuel pump, stock injectors now, radiator, fmic, intake and full 3in exhaust.

 

I experienced the same conditions as you when my omp wires ripped... with the stock ecu the car will go into limp mode which sounds like what your going through, but i noticed you have a power fc which i don't know if the ems has that feature...

 

Try checking the compression, probably one of the easier thing to do

 

pull your negative battery cable and press the brake for about a minute.... reconnect the battery and see if the problem has gone away. While you are at it.. check the check engine light for codes (i think the PFC does it with the exhaust temp light) You might wanna look for some input in the ECU section of the forum also for PFC related issues.