Investigating the above mentioned photograph the take off going straight down on all four ITBs would be the outlet with the very small gap just by the throttleplate (on my ITBs there's no vacuum there - i.e. useless) Ought to it sit within the throttle opener bolt at idle? Also, https://4age-20v-blacktop67765.losblogos.com/33691913/helping-the-others-realize-the-advantages-of-toyota-4age-engine-for-sale