If you let it idle untill it warms up, then what?

Does the problem improve if you let it idle until it reaches at least 80C on the temp gage? Or will it idle that long?

trants4md
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85 500SEL
80 Leland TR7 Convertible
And Some American Stuff
94 Dodge Ram
93 Chev Lumina APV
79-81-83 Forzda