have a question
 

what is the "secondly shut off valve"?
my car has a shaking when it idles(rmp goes up and down) so i went to a performance shop to check. the guy with a computer said i need "secondly shut off valve"
where can i get it ?
thank you

these cars tend to have rough idles. i see you have a turbo so maybe it is different. what is the variation in rpm at idle?

i would consider asking chickenwafer or mazdamaniac, but i would say you need to adjust your EMU

WHEN I STOP FOR RED SIGN ON THE STREET, THE RPM OF MY CAR 700 ~ 1100(UP AND DOWN) KEEP DOING THAT STUPID -_-;;;;

sounds like a vacuum leak

werd i think ur right chris

wish i would speak english well-_-;;;;;;;;;;;;;;;;;;;;;;;
sometime i don't understand what you mean by;;;;;;
plz....Mr.english come to me~ - _-;;;;

Goheesang.. you need to adjust your air/fuel ratio.. with the rx7s there is a lil screw that controls the air... near the AFM..

I'm not sure where its located on the 8's..

if that dont work then you have a vacuum leek some where (possibly one of your vacuum hoses are loose, have a hole in it, etc). I.E CHECK YOUR HOES! I MEAN HOSES

there is none on the 8, it's all electronically controlled by the ECU

follow what everyone else says about vaccuum leak.