Hesitation under light acceleration
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Member
Joined: Feb 2009
Posts: 80
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From: Dubia, United Arab Emirates
Hesitation under light acceleration
I have a new 2010 Platinum.
In my residential area, we have a number of speed humps which I obviously slow down for. However, when lightly acceleration away from the speed hump i occasionally experience a jerky hesitation.
It feels like the truck is trying to shift up, doesnt like it, slips and goes back down a gear.
The problem does not happen under more aggressive acceleration.
Any ideas?
FYI - truck is totally stock - stock tires, no tuners, no lifts or levels.
Cheers
In my residential area, we have a number of speed humps which I obviously slow down for. However, when lightly acceleration away from the speed hump i occasionally experience a jerky hesitation.
It feels like the truck is trying to shift up, doesnt like it, slips and goes back down a gear.
The problem does not happen under more aggressive acceleration.
Any ideas?
FYI - truck is totally stock - stock tires, no tuners, no lifts or levels.
Cheers
Senior Member
Joined: Jan 2011
Posts: 432
Likes: 1
From: Chicago Area
Your trans needs to be reflashed. I had this effect with my 2008 Sport Trac 4.6L 3 Valve 6 speed 6R60 Trans. After the reflash, the trans was smooth. This was a bothersome issue for me as when I'm driving in campgrounds around 10 mph, and stopping and going, it gets very annoying. After the flash, perfection!!
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Joined: Jun 2010
Posts: 49
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From: Niagara
How many miles? I had the same problem and asked the dealer about it. He told the transmission was going through a learning curve, and once it learned our driving habits it would go away. I know it sounds like a joke, (believe me I didn't believe him) but that was three months ago and I can't remember the last time it happened.
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Joined: Feb 2009
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From: Dubia, United Arab Emirates
The truck is 4 months old and has 7000 KM's
Ive heard of the truck 'learning' your driving style, and fair enough, I baby the truck and dont press to hard on the right pedal for normal driving. But after 4 months I'm thinking its learnt my style. Perhaps it doesnt like my style?!? ;-)
My dealer over here I wouldn't rate as very good so talk to me about the 'flash' that has been suggested. What do I need to tell them to do.
Cheers
Ive heard of the truck 'learning' your driving style, and fair enough, I baby the truck and dont press to hard on the right pedal for normal driving. But after 4 months I'm thinking its learnt my style. Perhaps it doesnt like my style?!? ;-)
My dealer over here I wouldn't rate as very good so talk to me about the 'flash' that has been suggested. What do I need to tell them to do.
Cheers
Member
Joined: Aug 2010
Posts: 21
Likes: 0
From: Wake Forest, NC
Does it happen all the time or just when the truck is cold? We have speed bumps in our neighborhood too and my truck does the same thing when I'm leaving in the morning. Rev's real high before it shifts. When the transmission warms it it seems to shift normal.
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Member
Joined: Feb 2009
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From: Dubia, United Arab Emirates
I have a remote starter so I always allow the truck to warm up a bit first. In other words the 'choke' isn't still on when I drive away. Not to mislead a helpful diagnosis but I havent noticed it much when the truck is 'cold'.
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Junior Member
Joined: Jan 2011
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From: Homestead, FL
Yes, i have had the same and worse. I took the truck to the dealer 10 times for the same problem. Time and time again they tell me nothing is wrong. Pissed me off to no end. They could have at least lied to me you know. Tell me anything but nothing is wrong, i want to slam their face into the grill when thy tell me that. I ended up buying out of pocket a new throttle body sensor for my 2010 platinum with the 5.4 and it fixed the problem. $ 130.00 dollars for something that should have been done under warranty.
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Joined: Aug 2009
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Try this. It worked for me.
Throttle calibration can substantially improve throttle responsiveness over "factory standard." Many people notice what appears to be sluggish throttle response or a "dead area" at initial accelerator depression. Throttle calibration can take care of these.
1) Insert ignition key and turn to "ON" (not start).
2) Wait for all idiot lights to go out. Check Engine Light may remain on.
3) Slowly depress the accelerator pedal all the way to the floor.
4) Quickly release the accelerator pedal until it's all the way back up.
5) Turn the ignition key to "OFF".
6) Repeat steps 1-5 twice more.
7) Start the engine.
Most drivers notice an immediate change in throttle response, but depending on your driving style, you may need to repeat this procedure periodically due to the computer's adaptive programming. You likely need to repeat this procedure any time the battery is disconnected.
1) Insert ignition key and turn to "ON" (not start).
2) Wait for all idiot lights to go out. Check Engine Light may remain on.
3) Slowly depress the accelerator pedal all the way to the floor.
4) Quickly release the accelerator pedal until it's all the way back up.
5) Turn the ignition key to "OFF".
6) Repeat steps 1-5 twice more.
7) Start the engine.
Most drivers notice an immediate change in throttle response, but depending on your driving style, you may need to repeat this procedure periodically due to the computer's adaptive programming. You likely need to repeat this procedure any time the battery is disconnected.
Last edited by bluetoy; Mar 7, 2011 at 06:55 PM.
Thread Starter
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Joined: Feb 2009
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From: Dubia, United Arab Emirates
Thanks bluetoy, i remember doing this on my '05.
kohiba, thanks for the advice. I hear ya man!! Drive ya crazy doesnt it! But howd you come to discover that it was the throttle body???
kohiba, thanks for the advice. I hear ya man!! Drive ya crazy doesnt it! But howd you come to discover that it was the throttle body???