I was cruising to work this morning at 75 80mph at 2krpms and my 5.0 starting sounding like it had an exhaust on it. The drone was louder then 04's full bassani exhaust and to top it off it was pulsing the sound. I couldn't feel it at all though. Did this for probably 2mins and that was it.. Is there a TSB for this or something? Cant imagine what could be bad on a new car to cause that:/

 

Did it throw any codes?

What are your mods?

 

If you can't feel it, it was probably a sound versus a mechanical issue.

Don't the 2010+ GT's have that lamo Sound Tube from the intake to the interior of the car to make "sound" like a muscle car to the driver?

I'd start there and see if maybe that tubing is loose.

 

I wouldn't worry about it. No codes.....running fine now......keep on driving. Now, if it happens a second time, there might be something but without a code, there is not much that can be done. Could have been a bit of crud in the fuel too.

 

This happened with my 2010.. I thought it was a tuning issue cause the car ran like crap on cold start sometimes, but after that tank of gas I filled up with fresh Sunoco and it was fine. Like Azpete said it could be crud in the fuel.

 

FORD:
2011 Mustang
ISSUE WARRANTY STATUS: Eligible Under Provisions Of
Some 2011 Mustang vehicles equipped with a 5.0L New Vehicle Limited
engine and built on or after 8/17/2010 may exhibit a Warranty Coverage And
malfunction indicator lamp (MIL) on with one or Emissions Warranty
more of the following diagnostic trouble codes Coverage
(DTCs) stored in the powertrain control module IMPORTANT: Warranty
(PCM) memory: P0301, P0302, P0303, P0304, coverage limits/policies are
P0305, P0306, P0307, P0308, P050E, or P2610. not altered by a TSB.
Warranty coverage limits
ACTION
are determined by the
Reprogram the PCM to the latest calibration using
identified causal part.
IDS release 73.04 or later. This new calibration is
OPERATION DESCRIPTION TIME
not included in the VCM 2011.5 DVD. Calibration
110703A 2011 Mustang: Check 0.3 Hr.
files may also be obtained at www.Motorcraft.com.
DTCs, And Reprogram
NOTE The PCM (Do Not Use
With Any Other Labor
PLEASE ADVISE THE CUSTOMER THAT THIS
Operations)
VEHICLE IS EQUIPPED WITH AN ADAPTIVE
DEALER CODING
TRANSMISSION SHIFT STRATEGY WHICH
CONDITION
ALLOWS THE VEHICLE’S COMPUTER TO LEARN
BASIC PART NO. CODE
THE TRANSMISSION’S UNIQUE PARAMETERS
RECALEM 04
AND IMPROVER 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.