Can't Boost past 11psi, >:/ Options

[batcavee00]

hey whats up guys, once again i have ran into another issue. this past weekend i was doing some tuning on my car and i wanted to UP the boost a little bit more, but to my surprise i cant go past 11psi......


i did another boost leak test and my intercooler pipes( inlet to outlet) hold 15psi without trouble and the pressure stays pretty steady....so no mo major leaks there...



i got a cheap MBC


when the MBC is closed i boost 7spi which is the wastegate spring load

MBC half way open = 11psi

fully open = 11psi

if i remove the boost controller and leave the hose that connects to it by itself, still get 11psi.............


so i im assuming i must have a leak somewhere past the throttle body...im not sure how to test the intake manifold and all other vac lines to see if i got a leak there under pressure, because in idling i sprayed starting fluid around injectors, manifold, ects. and idle didnt change.


or is it possible that my EGR could be leaking???


any help is appreciated

[batcavee00]

i think i found my problem, i was checking the car while it was on with a hose to my ear trying to listen around injectors, TB, etc. and i heard hissing sound coming from the back of my throttle body right by the IACV....that might explain why my idle would not go lower than 1100rpm without retarding timing..... im gona fix that leak today and hopefully i should be boosting a little better. thanks for the replies