I set up a turbo kit on a tu5 engine for about 10psi boost and used AEM piggyback. Everything works fine until it begins to warm up, then at high rpm it starts to loose power and something like misfire but there is no knock sound.
I used stock sparks since here( Iran) you can not find colder plugs.
Question is ...is it spark plugs problem or some other problems like noise on rev sensor?

thanks

 

I know Honda guys will save me

 

Loose power + misfire sounds bad.Did you tried to enhance the fuel wirth torco(or something) to see if it stops?