thelastsumurai

NO it's not low oil pressure.....There is no oil in the oil routing system ... If it goes away after a couple of seconds it not oil pressure. Have you changed your oil filter from factory stock?

P Zero

Umm what? That's exactly what it is. That's why after a couple of seconds it goes away --BECAUSE IT BUILDS UP OIL PRESSURE!

thelastsumurai

Sorry misread that, you are totally correct the real question here is why...
OP have you done anything to resolve this issue..Do you still have stock oil filter or an aftermarket one?..
If you still have orig filter get to your dealer ASAP... if you don't, get one and install it and if problems continues get to dealer asap..

Rob72

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
piston rattle noise in cold ambient temperatures of IMPORTANT: Warranty
10 degrees Celsius (50 degrees Fahrenheit) and coverage limits/policies are
below. The noise normally occurs in the 2000-3500 not altered by a TSB.
RPM range and will decrease as engine Warranty coverage limits
temperature warms up. An update of the powertrain are determined by the
control module (PCM) calibration to reduce intensity identified causal part.
and duration of the noise is now available.
OPERATION DESCRIPTION TIME
110704A 2011 Mustang: Reprogram 0.3 Hr.
ACTION
The PCM (Do Not Use
Reprogram the PCM to the latest calibration using
With Any Other Labor
IDS release 73.04 or later. This new calibration is
Operations)
not included in the VCM 2011.5 DVD. Calibration
DEALER CODING
files may also be obtained at www.motorcraft.com.
CONDITION
NOTE BASIC PART NO. CODE
RECAL 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.

wesslvm

Okay, so I'm not getting all this discussion on oil and oil filters.

What does the oil filter and possible drain back to the pan have to do with my issue? I had good oil pressure according to the gauge (does the car have idiot lights also?). Also, how does lubrication issues relate to the extremely rough idle, as if only running on some of the cylinders?

My dealer does free oil changes every 5000. My car was in about three weeks ago for an oil change (the first) and everything was fine until last weekend. I've been driving the car all week and no repeat issues at all.

thelastsumurai

OK read your first post and read my answer...

If you do no have oil pressure on first start-up you are going to hear a lot of noises because oil pressure has not built up yet especially the lifters (Rough start), rods and mains (banging noise)....This is not rocket science..

If you oil drains back into your oil pan you will not have oil pressure for several seconds...I don't know if this is your problem or not but based on your first post it appears that is your problem...do you anything about car engines? If all is OK then don't worry about it. You know when you made your first post you seemed very concerned.. Now you don't seem so concerned...If you are very concerned you would get back to the forum as soon as you could..We're her to help each other (most of the time) but we can't without feedback...

flash gordon

It takes time for the oil to circulate to the various parts of the engine, especially you have not driven it for some time in cold weather. Synthetic oil would help in this case because it would lubricate better than dyno oil and it sticks to the engine parts better than dyno oil.

JAJ

Actually, I think that the OP answered his own question: the symptoms are more consistent with a hydraulic lifter that leaked down than anything else.

wesslvm

Deleted text, dupe message!

wesslvm

Pardon me, but I don't spend a lot of time on this forum and I work rotating 12 hour shifts so hopefully I don't come off too arrogant...

I think you are trying to be helpful.

I overhauled my first motor in' 75.

I don't believe lack of oil pressure can cause misfires on startup, try to explain that to me.

The car is going to the dealer in the morning