If I had to start somewhere, I would start by changing out the plugs and coils as well as cleaning the Mass Air Flow Sensor. If still an issue, then I would run back to back fill ups with techtron followed up by cleaning the throttle body out with some intake cleaner and a small, wire brush. I would then be doing a sea foam via the brake vacuum line smoke show. If still doing hesitation after start up? I dont know.... Maybe change out the MAF?
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