High Speed Shut down??
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High Speed Shut down??
I have an 06 F-150 5.4. yesterday while i was on the highway i had the engine loose all power and it was vibrating like i was on a rumble strip. Was this the High Speed shut down? or do i have a bigger problem? if it was at what speed are they set at??? Thanks for your help.
Senior User
Joined: Dec 2004
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From: Boise, ID
Running a F150 at 90 is not abuse.. The only reason for the speed limiter is due to the ratings of the cheap tires. No idea what your local laws are, but with 75mph freeway speeds and heavy traffic sometimes you need to run 90 just to keep from getting run over.
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Joined: Feb 2003
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From: NJ ... the garbage state
Originally Posted by BruceFX4
Running a F150 at 90 is not abuse.. The only reason for the speed limiter is due to the ratings of the cheap tires. No idea what your local laws are, but with 75mph freeway speeds and heavy traffic sometimes you need to run 90 just to keep from getting run over.
I concur ... here on the east cost ... I-95 is the sped limit as well as the highway name
Posting Guru
Joined: Sep 2002
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From: North Carolina
Originally Posted by iskybantilus
I concur ... here on the east cost ... I-95 is the sped limit as well as the highway name
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Joined: Mar 2006
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From: NOR CAL
thats cool. Here in in california if you do 95 on any road that isn't private then your going to jail. Also speeds like that isn' t abuse on the truck. I would recamend a higher speed rated tire and sticking with the 3.55 gear ratios.
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Hear in Jersey you always stay behind the fastest vehicle. Unfortunatlly out of staters don't know that the left lane is only to pass. You can get a ticket by the way.As for your question, do you notice dash and or head lights flicker on and off? I would have to guess its more than a tire vibration because the power would still be there. Something must be dragging down on the engine. My Ford Taurus had the rear lock up only at high speeds but that was front wheel drive. When you find the cause please let us know. Good luck.
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From: North Carolina
K.O.T.O... THe reason it is happening is that there is a governor on it. There is a governor on yours too. It is usually 99 MPH then it shuts down. A tuner will eliminate this problem. Did the truck resume normal operation after slowing down?
MMNC (SS)(Ret)
Joined: Mar 2004
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From: SE Georgia
the 1 and only time I ever hit the governor I was going 98 mph and the motor was cut back to idle until I had coasted down to under 90 mph.
this is just a guess, but I'm wondering if your truck did something similar to mine and instead of idling down, the motor may have accidently turned off. then you were just spinning the motor with the tranny and not the other way around. have you ever rolled your truck down a hill and dropped it into gear to start it? the sensation is similar to what you described
this is just a guess, but I'm wondering if your truck did something similar to mine and instead of idling down, the motor may have accidently turned off. then you were just spinning the motor with the tranny and not the other way around. have you ever rolled your truck down a hill and dropped it into gear to start it? the sensation is similar to what you described
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From: Southeast Georgia
Originally Posted by guide
I have an 06 F-150 5.4. yesterday while i was on the highway i had the engine loose all power and it was vibrating like i was on a rumble strip. Was this the High Speed shut down? or do i have a bigger problem? if it was at what speed are they set at??? Thanks for your help.
Fleet Mechanic
Joined: Nov 2000
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From: In my House
a
Likewise, here in Connecticut, If you don't get behind the fastest vehicle , you WILL get run over. But we have so much ongoing construction forever here in this state, that you really can't get to high speed 
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