boost bypass help
 

ok i got my monte fixed half way but now when if i stab the throttle fast it wants to die. if i eas into it it works ok. if i hold the boost lever from moving and nail it it takes it . could it be the boost bypass valve or the silinoid. i dont have a boost gauge is a l67 swap. also when driving the tach drops and picks back up to normal. other than that it seems ok. thanks to who helped with qs i hade b for .

Either ICM or maf