It would affect the idle big time but if its not bad the bar will still rev up cause the airs moving trough it so fast but you'l have no boost still........! Thats what it sounds like to me......... Its the fisrt thing ya look for when that shit starts happening..........!
? Check the vacume pipes, one way is to spark up a fag and remove an end of a vacume pipe and blow the smoke through the pipe if theres a leak you will see the smoke coming out where the pipe is damaged if you get me!!
check the vacume pipe thats goin to the actuator from the boost solinoid on the right turret!!