I have your wastegate installed, but the car is producing more boost than the spring I have installed?Updated 3 months ago

There are many factors that could cause a vehicle to produce more boost than what the wastegate is set at. Common problems are a leak in the air supply line to the wastegate, an improperly sized wastegate for the application (usually too small), poor location/priority of the wastegate, or a stuck/seizing wastegate to list a few.