Hey, it might not be a wastegate problem? I found out on my '94 CTD 4x4 12V that is was not my wastegate, but instead, it was that damn fuel solenoid. I replaced it and after installing a fuel plate and 3K, I was smoken balls!!!! Just make sure that the solenoid is working properly by unpluging and unhooking, then drive it and you will feel the difference!!!!