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Idle surge?


Bronco

New Member
Joined
Oct 25, 2007
Messages
19
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Age
48
Vehicle Year
1984
Make / Model
Ford
Transmission
Automatic
On my 91 explorer the idle speeds goes up and down when it is idleing, about 200 to 400rpm consistantly any ides on what may cause this? Just did complete tune up and air and fuel filter.:icon_confused:
 


WisdoM

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Joined
Jan 2, 2009
Messages
159
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0
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Location
So Cal
Vehicle Year
1993
Make / Model
Ford
Engine Size
4.0
Transmission
Manual
maybe a vacuum leak?
 

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