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91 f-150 custom 302 2wd auto
on startup my truck will idle high for about a minute or 2 then go back down (i don't know how many rpms because my truck didn't come with a tach) does anyone know to solve this issue?
okay thank you i wasn't sure this is the first older vehicle I've owned
Same thing happened to me and I felt the same way. It's nothing to be concerned about, I believe it's for cold starts and to quickly warm up the engine. It would be different if it got really high but slightly higher than usual Is normal.
On top of the start up raised idle, the fan clutch will be engaged until the fluid redistributes making it SOUND like it's screaming when it really isn't.
Part of the "idling down" sound is the fan starting to free wheel.
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