high rpm miss.

[4doorboost]

so out of nowhere my car started missing at upper rpm. at first it was around 4500 so i backed down the boost and now its up around 5500-6k. i get no check engine lights. tps sensor is reading fine. im gunna change the plugs today and see if that helps. maybe my tune is off, but it never used to do this. i could run 20psi no problem and now i have the boost at 16 and still i get upper rpm misses.. could it be electrical or possibly fuel
any help appreciated. thanks

 

[4doorboost]

also i have a walbro 255 replaced the injector seals not to long ago, dont think i have any bost leaks. im thinkin maybe the boost controler or possibly even a loose rocker...

 

[alansupra94]

What kind of plugs are you running? Have you gapped them recently?

 

[4doorboost]

i run ngk brp 7 gap should be good i usually gap em between .025 and .028 but im gunna check em today. i think its electrical because this started happening after i got my car detailed so i think something under the hood got wet. no cel code though and only happens full boost high rpm full throttle.