My 02 duramax will not spool at all on the line. For some reason if i even touch the brakes a little bit or try and mash on them to build boost it will rev to 2500 rpm and sit there almost like its defueling. after about a hundred feet turbo will light and away it goes?! Now if i dont touch the brakes at all it will light right up and fuel like crazy. Is there some sensor on these older ones that is holding me back when i try and use the brakes? A friend has an 03 and he can use the brakes to spool all day and it works fine. It was no big deal with my stock turbo but now im runnin an a5k so i kinda need to be able to spool it. Any info is helpful. thanks.