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Old 01-09-2017, 09:42 PM   #5
shorod's Avatar
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Re: Engine stutter at 40-50 mpg

Cleaning the throttle body and changing the spark plugs (especially the plugs) are what I was thinking. I failed to see that you had responded to this thread so I apologize for the delay in responding.

On my wife's MKT EcoBoost I used Seafoam to clean the intake. I now understand that type of cleaning is not endorsed by FoMoCo, but it worked pretty well on her MKT.

How many miles are on your MKT? Have the spark plugs ever been changed?

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