ZD30 ... Low boost

[mudski]

What intercooler do you have, if its the OE one chances are its leaking.
easy to check if its oily its leaking

^^^^^This...

I got a welded intercooler. I did notice a bit of oil around my boost sensor on the intercooler. I got one of those boost gauge adapter's that sandwich between intercooler and boost sensor. Maybe that leaking . I might silicone it

....and this.
Boost leak 100%.

And no need to stretch the spring in the dawes anymore. This issue was corrected with a stronger spring about 3 years ago. Unless you have one of the older Dawes with the old spring then disregard my comment.