Wgdc behaviour, bad solenoid ? Sudden drop in WGDC % value

[Odan.be]

Hi,

My car is acting weird, more specific the wgdc behaviour.

when i load a modarate flash to 18/19 psi everything works as intended, good spool , car is on target, run after run after run

for instance.. this log

https://datazap.me/u/odanbe/rev-5-3-...-4-21-28-29-31

wgdc and boost act normal

But then when more boost is added, wgdc acts normal until sudden it drops 10%,
All logs after that , spool is slow, boost always under target and WGDC values lower as they should be.
in this log it happens at 5100 rpm
https://datazap.me/u/odanbe/rev-2-ex...-29-31&mark=95
this is a log after when the weird drop in the wgdc happens...
https://datazap.me/u/odanbe/rev-2-ex...-4-21-28-29-31

When i reflash the car, with the same or another log... wgdc is back to normal, and the car boost on target... until it happens again...
Until a certain wgdc value it all works ok.. then sudden wgdc drops 10% and all logs after that boost is slower and under target.

Should i replace my boost solenoids. or is there something else going on ?

[RocketSurgeon]

I'm not a tuner, but I did experience a boost solenoid failure. Essentially the solenoid has 2 positions, it can either apply vacuum to the wastegate actuator to close the wastegate and spool the turbo, or it can release vacuum on the actuator to open the wastegate. Generally they leak vacuum when they fail. My car got loud and slow when my solenoid failed because the wastegates were open and the car barely made any boost. Since your car is behaving and making boost up to a certain point, I think your solenoids are fine. I think this is a tuning related issue.

[jyamona]

It is a tuning issue. You need to raise your WGDC base table to match the higher boost you are trying to run.

[JBacon335]

could always play the MAF adder too