Ok so ive tryed just about everything from making a home made boost leak tester to checkin for vacume leaks...Im starting to think its the wastegate thats just not opening. Heres a list of my mods that ive installed since i got the car. Walboro 255, ebay fpr, 3inch divorved dp catless, 3 inch blitz nur spec catback, godspeed fmic, 3 inch intake, manual boost controller, new temp sensor new radiator new maf sensor metal headgasket hks ssvq bov. Now i have heard a lot about the divorced dp's having problems where the turbo was over boosting. Could this be the problem? it sucks having a supra that sounds mean as hell that cant go past 3/4 throttle without overboosting and hitting fc. any ideas fellas?