Just brought a 2001 Seicento 1.1. Runs fine when cold. When it heats up it then cuts out when idle. If I don’t stop I have no issues. Also when stopped if heating is switched on fast or fan kicks in, it cuts out. Any ideas?

You'll need to find out what goes missing.

Does it restart ok when warm and cuts out?

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It starts when warm but it struggles a bit but then will cut out again if I stay still. Starts fine when cold after 10min start having issues. Thinking coils maybe. It’s not over heating. No lights come on

Crank sensor?

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Mentioned that to my dad but he doesn’t seem to think so? Is there any way you can check this items before buying new ones? Brought car for work

get multiscan and check it

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We have changed coils and crank sensor no difference when ect unplugged car runs fine