surges at idle | Ford Explorer - Ford Ranger Forums - Serious Explorations

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surges at idle

March 12, 2013
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Year, Model & Trim Level
1998 explorer sport 4x4
my 1998 explorer 4.0 sohc started idling weird 2 days ago. at idle , in park , the rpm's fluctuate. the rpm's do not go up very much but its bad enough you can feel it sorta surge while driving when at a steady speed. i was sitting at the stop light this morning sorta on a incline so i let off the brake to see what would happen and after 3-4 seconds it revved a little surged forward like. does anyone know what would cause this or has anyone had this issue before? any help or info will be greatly appreciated.