2011 Mustang 5.0-Engine hesitation - Ford Mustang Forum
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post #1 of 23 (permalink) Old 08-26-2010 Thread Starter
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2011 Mustang 5.0-Engine hesitation

If I am on the freeway going about 60 and hammer the gas, the RPMs jump to about 5000 and then there is a second or two of hesitation before the car takes off....is this normal for the 5.0? I don't really notice when taking off from a stop. If I slowly hit the gas, it also doesn't do it at all.

Thanks in advance


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post #2 of 23 (permalink) Old 08-26-2010
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It is not normal, at least with the manual transmission. Do you have an automatic?

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post #3 of 23 (permalink) Old 08-26-2010
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Sounds like you have an automatic, so yes this is normal for an auto.

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post #4 of 23 (permalink) Old 08-26-2010
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Appears to be the same as the V6 with an automatic transmission, at least our 2011 V6.

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post #5 of 23 (permalink) Old 08-26-2010 Thread Starter
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Yeah, it is an automatic....guess I should have stated that lol. So it is normal then......pretty annoying. I guess it is just something I need to get used to....my 2004 gt didn't have that lag.

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post #6 of 23 (permalink) Old 08-26-2010
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I guess the word is a tune will eliminate this. It is annoying.

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post #7 of 23 (permalink) Old 08-26-2010
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If you got a tune Im sure it would be a lot better,autos normally have this kind of problem and a tune always fixes it.

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post #8 of 23 (permalink) Old 08-26-2010
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Any idea why they build this delay in?

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post #9 of 23 (permalink) Old 08-26-2010
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Quote:
Originally Posted by wolfstar View Post
Any idea why they build this delay in?
Most likely for MPG... or some other bs that not that many people would care about or notice... considering I doubt it even changes MPG by more than a quarter of 1.

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post #10 of 23 (permalink) Old 08-26-2010 Thread Starter
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I have never owned a car with that type of hesitation. It is kinda dangerous if you are jumping into the passing lane in heavy traffic. You switch lanes with people flying up on you, slam on the gas, and sit there for 1-2 seconds before taking off. Sounds like I need a tune.....or need to learn how to time the hesitation so that I hit the gas before changing lanes

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Quote:
Originally Posted by Waters View Post
I have never owned a car with that type of hesitation. It is kinda dangerous if you are jumping into the passing lane in heavy traffic. You switch lanes with people flying up on you, slam on the gas, and sit there for 1-2 seconds before taking off. Sounds like I need a tune.....or need to learn how to time the hesitation so that I hit the gas before changing lanes
The hesitation should not be that bad maybe you should go to the dealer to get it checked out I know there is supposed to be some hesitation with autos but if you floor it and count two full seconds(one thousand one,one thousand two) and you still don't move at all I think something might need to get checked out maybe a throttle body sticking,maybe the tune from the factory is off? I am not familiar with the new 2011 5.0's I am just taking my knowledge from the 4.6 motor and trying to translate it over to the 5.0's I hope I helped you out a little.

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Quote:
Originally Posted by Waters View Post
I have never owned a car with that type of hesitation. It is kinda dangerous if you are jumping into the passing lane in heavy traffic. You switch lanes with people flying up on you, slam on the gas, and sit there for 1-2 seconds before taking off. Sounds like I need a tune.....or need to learn how to time the hesitation so that I hit the gas before changing lanes
I have a 2011 3.7 with the same auto, I agree with you about how dangerous it is, when jumping into the passing lane.
I now have 3.73 rears and a tune, trouble with down shifting gone. A tune will take care of this problem.
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post #13 of 23 (permalink) Old 08-26-2010 Thread Starter
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Quote:
Originally Posted by MeanChad1 View Post
The hesitation should not be that bad maybe you should go to the dealer to get it checked out I know there is supposed to be some hesitation with autos but if you floor it and count two full seconds(one thousand one,one thousand two) and you still don't move at all I think something might need to get checked out maybe a throttle body sticking,maybe the tune from the factory is off? I am not familiar with the new 2011 5.0's I am just taking my knowledge from the 4.6 motor and trying to translate it over to the 5.0's I hope I helped you out a little.
It is probably much closer to 1 sec....just feels like an eternity when you are expecting 412HP and you have cars flying up on you.

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It is the 6 speed tranny. My 2010 F-150 is the same way. It has a 1-2 secon lag that drives me nuts. I will be getting a tune for it soon.
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Has this been tried to calibrate the ECU and pedal?

Turn off all electrical components.
Turn the ignition to the ON position so the dashboard lights and chime come on(Do not start the engine).
Wait until the chime stops.
Smoothly depress the gas pedal to the floor while counting to 5(1001, 1002,...).
When the pedal reaches the floor slowly release it while counting to 5.
Count to 6 after the pedal is fully released.
Turn the ignition to OFF.
Count to 6.
Repeat the procedure 2 more times.

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