Question about 2006 Mercury Milan
It sounds possible, first unplug the Mass flow meter and check for corrosion. This would be the part under the Airhorn area on top of the intake manifold. Then try to find an RPM that the engine will run steady at and then use a water spray around the seams of the intake manifold, vacuum lines, and EGR valve. A leak will change the RPM.
The diagnostic system works pretty good, but it can be fooled by physical changes that mimic a defective part, like a vacuum leak.
I see you have a 2006, depending on service date and mileage you still could have warranty. The automakers also classify some engine controls as Pollution equipment with longer warranties. It is good to check for this and any service bulletins for a problem part. Good Luck with your repair.
Posted on May 05, 2010
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Posted on Jan 02, 2017
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