Ways to combat boost creep Options

[6G94celica]

Ok so before my car died my boost gauge at the most i ever noticed read about .9 bars. calculated thats about 13 psi. i bought an upgraded ct26 with a larger compressor wheel from brashboy on ebay. im not sure what the wastegate is set at but this seems really high. i dont want to wreck anything internal and only want to run about 8 or 9 psi. also i have a custom 3 inch exhaust that i personally built with a high flow xlerator muffler with a single 3" inlet and dual 3" outlets. i know im running some major boost creep and am wondering how best to stop that and add some backpreassure to the turbo to slow freewheel.

[darthripley]

if you have the wastegate ported on a CT series turbo it helps keep the boost creeping in check.
i have a CT-27 with the wastegate ported along with a 2.5" KO DP + 3" MP + stock catback <---will replace soon.
i've only hit fuel cut a handful of times on cool nights & in the winter with a JDM ECU which is around 15psi.
any other time boost stays around 10psi in 90+ degree weather, 12psi in 75+ degree weather and 14psi in temps lower than 65 degrees.
just by having the wastegate ported i haven't had to worry about buying or making a boost controller as the boost stays where i want it & fuel cut is still enabled to keep me from killing the motor.

Death, it sounds to me like you are having problems with the TVSV, b/c you should be making at least 8psi in 3rd gear on a bone stock motor.
ECU limits the boost in 1st & 2nd gear to only 5psi & after you hit fuel cut it will go into limp mode allowing only 5psi until the car is shut off & turned back on again.
If someone had a MBC installed then they disabled/bypassed TVSV.
you may also have a vacuum and/or boost leak somewhere.
do you hear any hissing in & around the engine?
what is your vacuum reading at idle?