It sounds like your 360 Modena is experiencing a common cold-start fueling issue, likely related to fuel pressure bleed-off or weak injectors after sitting. The fact that it starts fine when warm and behaves better after a long motorway run suggests the fuel system isn’t holding pressure properly over time, possibly due to a tired fuel pump check valve, regulator, or dirty injectors. I’d recommend checking fuel pressure at startup, inspecting the pump and regulator, and considering an injector clean to restore consistent cold-start performance.
https://www.bestcarbattery.co.uk/
https://www.bestcarbattery.co.uk/