Thanks alec, thatd be a lot easier than making a typical purchase to ford!

 

Ford has a TSB on this. See Below.


5.0L—CALIBRATION UPDATE—VARIOUS ISSUES— TSB 11-3-32
BUILT ON OR BEFORE 8/16/2010
FORD:
2011 Mustang
ISSUE WARRANTY STATUS: Eligible Under Provisions Of
Some 2011 Mustang vehicles built on or before New Vehicle Limited
8/16/2010 equipped with a 5.0L engine and either a Warranty Coverage And
manual or automatic transmission may exhibit the Emissions Warranty
malfunction indicator lamp illuminating with Coverage
diagnostic trouble code (DTC) P050E, P061C, an IMPORTANT: Warranty
intermittent hard start/long crank time up to two (2) coverage limits/policies are
seconds, or an idle speed dip, roll and variation in not altered by a TSB.
hot ambient temperatures. In addition, vehicles Warranty coverage limits
equipped with an automatic transmission may are determined by the
experience an idle speed dip, roll and variation in identified causal part.
first gear coast or during an immediate reverse
engagement after starting the engine. OPERATION DESCRIPTION TIME
110332A 2011 Mustang 5.0L: Check 0.3 Hr.
ACTION DTCs And Reprogram The
Reprogram the powertrain control module (PCM) to PCM (Do Not Use With
the latest calibration using IDS release 72.01 and Any Other Labor
higher. This new calibration is not included in the Operations)
VCM 2011.3 DVD. Calibration files may also be DEALER CODING
obtained at www.motorcraft.com. CONDITION
BASIC PART NO. CODE
NOTE RECALEM 04
PLEASE ADVISE THE CUSTOMER THAT THIS
VEHICLE IS EQUIPPED WITH AN ADAPTIVE
TRANSMISSION SHIFT STRATEGY WHICH
ALLOWS THE VEHICLE’S COMPUTER TO LEARN
THE TRANSMISSION’S UNIQUE PARAMETERS
AND IMPROVE SHIFT QUALITY. WHEN THE
ADAPTIVE STRATEGY IS RESET, THE
COMPUTER WILL BEGIN A RE-LEARNING
PROCESS. THIS RE-LEARNING PROCESS MAY
RESULT IN FIRMER THAN NORMAL UPSHIFTS
AND DOWNSHIFTS FOR SEVERAL DAYS.
NOTE:

 

Your TSB you listed above does not apply to the poster of this thread.
He does not have a 5.0.
Look at his vehicle listed...2005 V6

 

I had problems with rpm dipping and hanging around the idle speed range. I removed the TB and gave it a good cleaning. The cleaning helped, but the problem was still there more than I thought it should be. That was last fall. This spring I again removed the TB to see if I had missed an area. It was still clean, but this time the car ran so much better. I think I had a slight vacuum leak at the TB. When I put the TB back on this time, I used a torque wrench to tighten the TB bolts. My car has never run so good....