Was wondering if anyone on here could help with a problem on my cav turbo. It's having trouble boosting properly. In the lower gears it's not really that noticeable but when you get to fourth or above it is. The car is fitted with a boost gauge and it shows that under hard acceleration, the boost is whipping up to 10+ psi, but thaen dropping down to five. It then bounces between 5 and 10 psi and runs like a dog. I've just bought the car and I know it's had a few mods, one of which is the actuator. Does anyone have any idea what the problem might be. Any help would be greatly appreciated.