2011 Flex Ecoboost rough idle

[mprivi]

I just picked up a 2011 Flex 3.5L Ecoboost little over a month ago. I just hit 75K and noticed a rough idle/ acceleration/deceleration, NO CEL. I planned on getting a Ford inspection and purchasing an ESP but now I'm having this issue and don't think the dealer will pass the inspection for the warranty.

I'm hoping changing spark plugs along with the boots will help this out. I was also thinking of cleaning the MAP sensors, but not sure where they are? Unless anyone knows of other things to look for? This is my first Ford and Turbo. Any help you guys have would be greatly appreciated.

If I pick up an OBD2 is there a way to monitor the system as I drive?

[SHOdded]

Sorry to hear your Flex is acting up!  it could indeed be plugs or MAP sensors.  Changing the plugs, inspecting the old plugs' condition is a great first step.  Never hurts to clean the MAP.  Add an OBD II adapter and Torque Pro software, and you can monitor a lot of valuable parameters.

The MAP sensors are circled


the blue is a 3-bar, the yellow is a 2-bar stock.  The yellow one is the one you swap out to 3bar when you upgrade for a tune.

Could also be an O2 sensor or a fuel injector issue.  Let's hope not an injector.

Finally, is this only on the current tank of gas?

[mprivi]

Thank you ... yes it seems to be on this tank I filled up on Friday noticed it in Sunday.


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[SHOdded]

No harm in changing out the plugs/cleaning MAP sensors anyway.  But ride out this tank of gas, or at least 1/2.  Then add some Top Tier 93 in it to see if the situation improves.
http://toptiergas.com