Mine did something similar to yours with the kangerooing/ missfires etc so went and bought the pressure sensor and wiring upgrade which I did and it cured the main issue ( starter was still gooosed though so got rid stupidly as could of been a good car!) anyway heres the tsb bulitin in my thread might be worth chcking the wires are in the correct place in the fuse box and correctly attached just to make sure its been wired up corrrdctly
Thanks! Mine has already been changed and car worked fine for 2 years with it. So I’m sure wiring is correct. Also I would get a sensor fault if cable was an issue, but I don’t. Do you remember your fault codes?