Ford Repair: 1993 Ford Explorer Eddie Bauer, ford explorer eddie bauer, explorer eddie bauer

Question
The suv starts fine, runs great for about 20 min. then starts to rough idle when sitting at a light, even so much that it will shut off. Starts right back up fine but will then continue to rough idle and even start to putter or lag when continuing to press on the gas to go. Replaced spark plugs and wires, fuel filter. Took to shop and ran diagnostics....nothing. Replaced PCM....still nothing. Any ideas?

Answer
Ouch,PCM's are not cheap.Start with the idle air control valve by cleaning it and the throttle body or replacing it(IAC).Check any of my previous answers dealing with rough idles in the subject.Have the fuel pressure checked if this doesn't help.Let me know if there is still no change and also what the fuel pressure reads.You're mechanic could also run a can of engine fog,it works pretty good and that have to disconnect the fuel line when they do it,so you might catch a break on labor.