Question about 1991 Ford Econoline
Ford E250 ClubWagon 5.6 EFI random high idle-won't kick down
Could be Idle control valve sticking, vacuam hose leaking or upper intake plenum gasket failure, if you've already checked to make sure thottle plates are closing. Next time it happens, try tapping on the IAC with a small hammer and see if the idle drops to normal.
Posted on Jan 04, 2009
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Posted on Jan 02, 2017
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