What equipments i need to tweak my volvo ecu?

Every Tool should do this ECU. EDC16 inside.
But you Need to do on the Table, k-line noz connectet to OBD-Connector.
Also possible with BDM

You might try this：VOLVO VIDA DICE Diagnostic Tool

EDITED BY ADMIN

1. Maintenance information and steps
2. Product index query
3. The fault tracing and diagnostics Step
4. Communication with the vehicle
Description:

1. VIDA DICE - Diagnostic Communication Equipment, is a tool that is used together with VIDA all-in-one to communicate with the vehicle. Communication makes diagnosing and troubleshooting the vehicle possible, as well as downloading software.
2. VIDA DICE has an integrated CARB cable, which is connected to the vehicle's diagnostic socket. When connecting to the vehicle, DiCE is powered as long as the battery is charged.
3. VIDA DICE has a folding hook that is designed for hanging the unit from one of the grab handles in the vehicle for example.
4. VIDA DICE is equipped with four status LEDs that indicate the status of the software, the USB and Bluetooth communication and the interface to the car.
5. At one end of the unit, there is a DC input where a battery cable or adaptor(12V) can be connected. The adaptor is used when upgrading and troubleshooting the DICE.
6. In the other end of the unit, there is a removable cover that could be removed by turning the screw on the cover.