Quote Originally Posted by Bidja View Post
Richard, the VNT actuator (you refer to it as: the waste gate actuator), appears to be working correctly.

There appears to be adequate vacuum at the VNT actuator as the rod moves up with vac hose connected and then drops down when hose is pulled off "with engine at idle".

CHECK _ With eng at idle (hose connected /rod up): is the actuator rod / lever resting against the vane limit stop screw.
The actuator rod does not reach the vane limit stop screw when idling. *After a bit of google to figure out that its not the two bolts on the actuator arm hahah*

Quote Originally Posted by Bidja View Post
FYI, Full vacuum at actuator with engine at idle is nom 23"Hg (inches of mercury _ vacuum)

Be worthwhile to use a scan tool and check for any fault codes. Clear them but but first record any if reported?
I don't have a Auto Diagnostic Scanner, I'll see if i can borrow one locally or I'll pick one up for myself.

Quote Originally Posted by Bidja View Post
Are you running a stock ECU?

What was the max boost, if you know the level before current boost issue?

Maybe a limp fault causing problem.
We can test VNT turbo boost response with bypassing manual boost control _ need to check and action above first.
Correct running stock ECU.

Boost was running at 15psi.

Appreciate the help, eager to get back into it to figure this out.