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Rough idle

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Old 01-18-2014, 12:22 PM
Fummins Fummins is offline
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Rough idle

I have a 1992 F150, 300 6cyl. I have a problem with a rough idle on initial start up, or after is has set and is cold. It smells EXTREMELY rich when it idles rough. On a 70 degree day, it will idle rough for approx. 10 seconds, and then smooth at immediately. On a 50 degree day, it may rough idle for 30 seconds, and on a 20 degree day, it may idle rough for several minutes. When it smooths out, it is like the flip of a switch....immediate. I replace the IAC, the computer, and one temp. sender.

Any ideas????
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