Rough idle at start on cold days | Ford Explorer Forums - Serious Explorations

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Rough idle at start on cold days

thomasp94

Member
Joined
November 6, 2009
Messages
16
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0
City, State
Pennsylvania
Year, Model & Trim Level
1991 Sport
Hello. My 1991 sport has developed a new issue this winter. On cold days, usually 40 degrees or below, the engine will have a rough idle at start up. The idle is very noticeable, from outside the truck it sounds like a"chugging" type sound and if I try to drive the acceleration is rough and jerky. The problem goes away about 1-2 minutes after start, if I hold the idle around 2,000rpm it will go away even sooner. After this the engine is fine, runs perfect, no power loss, no noises. If it's a warm day it won't do it at all, but every time the engine is cold on a cold day this will happen. Been doing it for about 3 months now. I drive the truck almost daily.
 






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