new wiring specialties pro harness doesn't rev passed 6k

[sil14zenki]

before installing the harness, engine would rev all the way past 7k
after installation of the harness,(wiring specialties pro harness) motor cranked up first try and revs and drives great. but feels like ignition cut at 6k. i have checked all grounds,maf,tps,cas, etc and everything checks out fine. i'm aslo checking for boost leaks and spark plug gap but it just keeps cutting out at 6k like if i had a bee R hooked up. any ideas? or anyone with any similar issues?
s13 sr20det/enthalpy tune
don't know if my splitfire coils has anything to do with it.
i noticed the sub harness provided by ws has two grounds integrated into it plus an additional ground for the back of the head.
and the splitfire subharness only has one ground integrated in it. and the amplifier has a ground for the chassis.

[frankies1390]

u might be on to something with the coil packs, do you have a stock set of coil pack you could throw at it? start there or maybe call them direct the are more than helpful!!!

[laurentj23]

Check your fuel pressure at that rpm. Go to their troubleshooting website and check it

[angel mkiv]

Not sure why you asked on zilvia and didn't call/email yuri? He replies to emails 7days a week.and checks his emails frequently.never had issues with his tech support

[sil14zenki]

i called and no answer. i'm assuming cause of the holidays. i sent an email.
and my friend will be lending me his stock coil packs tmrw. i was just seeing if anyone had any issues with the ws harness and splitfire coils.
btw happy holidays everyone!!!

[sil14zenki]

could the speed sensor have anthing to do with rev cut at 6500rpm?
i've tried stock coils. checked and re checked all my grounds.
i'm leaning towards something very simple as it would rev freely before
installing the harness. maybe something was bypassed with old harness.
any input would be greatly appreciated. thank you and happy new year!!