hey i just put on a mbc from ams and set it to 21 pounds of boost! but after about 6k rpms it drops down to like 16? am i supposed to unplug the wiring from the stock boost controller or leave it hooked up or what else might be my problem?

 

you probally have a boost leak

 

where would i check? i went through it all once....

 

could it be the stock bov?

 

i know my stock bov leaked like a ****

 

do a boost leak test, thats the best way to find out where its coming from

 

how would i do that test???