Rough Idle When cold | Ford Explorer Forums - Serious Explorations

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Rough Idle When cold

MM9886

New Member
Joined
December 29, 2010
Messages
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City, State
Lambertville Michigan
Year, Model & Trim Level
1998 Mountaineer
Hello, Im having some Idleing problems with my mountaineer. Its a 1998 V6 4.0. When I start my truck in the morning the engine will run fine at about 1500-1700 rpm. After about 3 seconds it acts as if the Choke kicks off. After the motor warms up it runs just fine no problems at all. It has brand new plugs, wires, coil pack, Iac motor, Cleaned the MAF. Im stumped about what the problem could be. Anyone have any Ideas??
 






EGR not opening?
 






Did you check the idle air control valve?
 






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