@ cosy trav,

not at all, if your ECU is a red label L 8 you only have to change the tps.
If it's an green label L 8 IAW 0.48.08 you have to change the tps and the wiring loom, because of it's hego sensor lambda control.
After changing, control the lambda, that the engine is not running too poor on gasoline. Rich or poor gas you can adjust at the screw in the ECU positioned at the left side the wiring loom fit's into the ECU.

Best

Ronny