Sorry it's not a 480 but i assume the 460 with the 1.8i is the same engine???
From cold needs plenty of throttle to start then won't idle for about 5 mins after start-up & needs throttle to keep revs up with handbrake needed to stop otherwise stalls straight away as revs drop right off when slowing.
Starts straight away again with more throttle needed.
When semi warm & above runs like a dream & also fine starting up when engine is warm.
Any help greatly appreciated
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