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Message: <blockquote data-quote="VSTOLG4" data-source="post: 1257754" data-attributes="member: 25934"><p>Not sure it is even remotely related but starting about 1 week ago I started feeling a stuttering under very light throttle when motor is mostly still cold.  Tonight was the first time I noticed the mpg flutter at the same time I can feel the motor stuttering a little.  The stutter reminds me of an old 2 stroke dirt bike that would foul a little and then suddenly clean up and pull smooth.  When I push the Raptor's gas pedal down a little the mpg gauge is more steady and the motor smooths out.  Never noticed this before last week and have had my '18 for about 5 months...with MPT tune.  I've cycled a few versions of my tunes this week and the stutter is still there.  When the motor warms it goes away.  Again, didn't do this until about a week ago.  Not saying I have an issue and not saying it is related the OP...just sharing some thoughts.  I have MPT tune and SP542 gap @ .025.  No codes and Ngauge gauges look clean when stutter happens.  Most likely a poor tank of gas or similar but strange nonetheless.</p></blockquote><p></p>