Investigating the above mentioned image the choose off heading straight down on all 4 ITBs may be the outlet of your small gap just through the throttleplate (on my ITBs there is not any vacuum there - i.e. useless) Are there any shops in your town that have a dyno https://stephenwbyvb.blog-ezine.com/34778473/new-step-by-step-map-for-blacktop-20v-4age