[Bob Lincoln]

This thread may help:

http://www.turbododge.com/forums/f4/f14/407306-help-waste-gate-sol-question-2-a.html

Wastegate is computer-controlled via a solenoid that controls the vacuum. Check hoses, check fault codes.

 

[Bob Lincoln]

You can tell from the boost gauge if it spools down. It sounds like it continues to read high. Could be a clogged or loose vacuum line, per the link I posted.