Post by
slownslurious »
https://forums.nicoclub.com/slownslurious-u29303.html
Wed Jun 15, 2005 8:49 pm
umm I'm no expert but since no one else has replied yet, if it was my car I'd:1) check vaccuum lines. any holes, cracks, routed to a good vaccuum source, etc?2) check mechanical linkage to wastegate, is it on, properly adjusted, moving with appropriate level of boost?3) remove turbo extension and check out the flapper door, just seeing if it was opening and closing with the linkage.If the lines are good but the linkage isn't connected, fix it. If the linkage is good and when you move it with your hands it opens the flapper door, but it doesn't budge under boost, its probably a ruptured diaphragm and your actuator will need replaced. If the linkage is moving properly but the flapper door isn't opening, I'd guess there would be some sort of mechanical failure along the way, and you'd have to figure out what broke and repair/replace.
I guess thats a decent place to start...