Ford F-150 (2009-2014) :: Unintended Acceleration During Slow Down From High Speed
Sep 13, 2011
I took my 2011 Lariat in for first service and reported that it sometimes tries to accelerate on its own during slowdown from high speed, eg when coming off a freeway ramp, rpms go up and vehicle wants to speed up rather than slow down. (sounds like something a Toyota would do!)
Dealer says its a known problem with 5.0L and performed a supposed fix per "TSB 11-8-9, 5.0L ENGINE BRAKING PERFORMANCE DURING LOW SPEED COAST DOWN," essentially a PCM reflash.
Happened once in a parking lot...thought the floormat was stuck on the accelerator but the pedal was clear.
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My husband and I bought a 1995 Ford Crown Victoria not too long ago. We have already had to replace the brake lines 2 times (well, first the front and then a few weeks later the back). It has had nothing but problems. One thing is the air conditioner, but that probably just needs charged.
Now on to the bigger problems. All of a sudden we started having unintended acceleration. It is strong enough that if you don't have the brake pressed hard it will move your car forward every 5 seconds. The engine revs up on its own. This happens every time we stop anywhere. Including when I was pulling into a parking spot last night. I went very slow and as I was turning pressing on the brake it revved up and I thought for sure the way it jerked, it was going to go over the curb into the road. This scares the crap out of me.
Also, we have a problem with the slow (very slow) start. I know they had a recall on the cruise control, but I have not heard of any recalls on this. However, I did read somewhere about accidents happening due to this and something about it had to do with the way Ford build the car.
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Recently, my 2003 manual honda civic accelerates very slowly, even the engine speed goes up to 4000 rpm. Usually it takes up to 1 minute to reach 60mph on high way. Is the clutch getting bad?
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For the past 4/5 weeks my truck vibrates when i brake at slow speed ex. Driving out of a parking spot, slightly braking no matter if i go forward, reverse, turn or go straight it'll vibrate, sometimes very lightly, but usually it's very noticeable, can be compared to the clutch pack issue with these trucks. I had the clutchpacks in the rear diff. replaced at 160k ,after that it drove very smooth but that only lasted 20/30k.
So when turning it'll vibrate at about 15/20 km/h, but that's because of them crappy clutch packs
truck:
2009 f150
xlt ext. cab
4x4
xtr package
6,5 ft box
5.4 L
212000 km
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2010 f150 4x4... Whether I'm in 4wd or 2wd when I turn at low speed something in the rear has slow clunking but clears out after a few feet of going straight. This occurs with or without a trailer behind me. Just bought this truck a week ago m noticed it about the third time I drive it.
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I have a 2012 4x4 EB CC. In 6th gear, on the highway between 1200-1700 RPM's, during a slow acceleration, it feels like it is missing or shuddering. It is most pronounced going up a hill, and/or towing something. As soon as you get above about 1700, it goes away. Rig needs to be fully warmed up (not just the engine, but tranny/drivetrain). Needless to say, this is generally from about 52-65 mph, which is most highway (not freeway) driving I do. At times it's so bad my wife says it's time to get a Chebby.
Had it in about a year ago, couldn't duplicate it. Took it in this last week. Did the TSB on the plugs, and was told that would fix it. It didn't. Took it back in; they couldn't duplicate the issue. Rotated the tires hoping that might do something. Took the head service guy for a ride, and made it happen; it was very obvious then. It seems like the tachometer should bounce or shudder a bit when it's doing it, but nothing. It's going back in on Monday to see what they can do.
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Under acceleration when close to the limit of adhesion during high speed long sweeping turns I was noticing an oil smell last year. I can't say if it was R, L or both turning directions since its been a full winter since I have driven the car.
I'm using Mobile 1 5w30, a stock air box and I have headers. I'm also running 305 PSS tires, and a pretty well modified suspension. I have no facts to back this up but I am assuming because of my setup that I can get a little more lateral acceleration then most.
I have zero oil consumption, no leaks and good test results from Blackstone. My only thought is that I am pushing a little oil in to the crank case breathers during this hard cornering.
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I replaced the blower motor resistor on a 2010 F150 with dual climate control where the blower was stuck on high.
After replacing the resistor, now the lower speeds work fine, but when placed on high speed, the fan completely shuts down. Replace with the old resistor, and it only runs on high.
How to proceed, or what else might be the problem?
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The owner of the car claims that there was sudden unintended acceleration, and it was 09' Sonata.
Video .....
I thought this should be very concerned to us, since we all drive 11' sonata & up. I heard Hyundai installs some kinds of system to prevent this incident to all cars manufactured after May of 2012.
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I've read quite a few instances in this forum of unintended acceleration in the Toyota Sienna. Well it happened to me this morning. I was pulling into my parking spot at work with my foot lightly on the brake, going about 5 or 10 mph when the vehicle suddenly accelerated as if someone had floored the accelerator. The vehicle went up over the curb and into the side of the building. When I told the policeman what had happened, he said that isn't possible. I told him it was possible because it just happened to me. I had it towed to the dealership, called my insurance company and Toyota to make a report of the incident. They will be sending someone out to check out the car, but I'm sure they won't say there is anything wrong with it. I'm sure it won't be impartial since they don't want to be held liable. I also made a complaint with the NHTSA. I am afraid to drive the car and will never buy a Toyota again.
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My 2005 4.2L w/ 139,000mi , giving the above warning. Thinking it was a gremlin, I raised the vehicle height and all seemed well until I got onto the 101 fwy here in SoCal and hit the threshold speed to lower the height.
That's when the engine rev'd to 7k RPM's. Initially it quieted in neutral and I drifted to the shoulder with one shift back into D and 7k RPMs for a bit of power. After that, any start and it revs immediately to 7K upon start.
Flat bedded to Santa Monica VW and await Ivan, their Phaeton mechanic to return tomorrow. Service writer Jeff wondered about front suspension but connection to acceleration is a mystery.
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My 2013 goes 7mph with the foot off the gas. Why is it doing this and is there any way to correct this?
Is this normal? I have to keep my foot jammed on the brake to stop the car from lurching forward.
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I have a scary problem with my 2005 Civic Coupe HX CVT that the dealer can't resolve - my car drives forward and even accelerates when my foot's not on the gas! This is a recipe for disaster, especially since I live in a cold climate and there's so much ice and snow in winter.
I thought at first I must be crazy. So I've tested it by taking my foot off the gas going up a small incline, and Voila! It drives up the hill! It also can drive around the block by itself! It's like the energizer bunny, and I'm scared to drive it anymore.
The dealer has no clue why this is happening and can't seem to replicate the problem. I've brought it in more than once, too.
It happens most often when my car's been parked for awhile, say 6 hours or more, and if it's really cold outside, say less than 32 degrees outside. Also the heater's usually on when it happens, but that may be incidental since it's usually cold when the problem occurs...
Also, There's a whine that sounds like a belt that gets loud when the air conditioner runs and also if it's really rainy. I've taken it in to the dealer a couple different times and they fix it, but then the sound comes back again. Could this be related?
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Recently my brakes were feeling a little spongy so I took my X to a local shop who installed new front and rear brake pads and flushed the brake fluid. The brakes seemed to operate properly.
But, then while driving on the interstate in Tampa, I had to SLAM on the brakes but it seemed like it took forever to slow down. It's hard to describe, but it's like when you are moving at interstate speeds and then you have to SLAM on the brakes, the X just slows down and comes to an eventual stop. It does not stop quickly.
I do not feel any pulsing from the antilock braking system so I don't think it is being activated for some reason. This seems to only happen at faster speeds. I have no problem when driving around town and slowing down for stop signs or red lights. It slows and stops just fine.
So I took the X back to the shop and they replaced the Booster w Ford booster. I thought I checked it out as soon as I picked it up around town AND on the interstate.
But, today I had to SLAM on the brakes while on the interstate again and it is acting just like before - just slowing down, but not fast and without the antilock brakes activating (apparently).
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I have a 2009 Ford Focus and have been having a problem with the brakes. When I hit the brakes at any speed there is a feeling of pulsing as I slow down. It is proportional to the speed I am going. It feels like there is an unevenness to the rotor or brake drum that makes one spot on either of those hit the brake pad/shoe more severely than the rest of the pad/shoe and thus I slow down more during that one spot. Maybe the best way to describe the feeling is like this: While the brake pedal is pressed down it feels like I am slowly pulsing the pedal even though the pedal is steadily pressed down. This pulsing feeling slows down as I slow down until I stop. What might cause this?
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I came off the turnpike the other day stopped at a light and my car, 2006 Hyundai Elantra 175000 miles, started rolling backwards. I put my foot on the gas and there was no movement. Put the car and park and it wouldn't start. I pushed it into a gas station and the attendant (attendant, not mechanic there was no service station) changed the oil and added some coolant. The car then started up fine and I was able to drive a quarter mile to work. When I was driving home I immediately noticed that there was a change in acceleration. It takes forever for the car to speed up... Pedal to the floor and it is lagging greatly. It seems to be going up to 4500 rpms just to reach 40 mphs at a slow pace. Once the car gets up to 60 mph the rpms drop to normal. I haven't gone faster than 60 mph in it since this happened, but it seems to handle fine at that speed. The issue is getting up to that speed. I don't know if it is related, but the air conditioning is very weak since all this happened. I have to turn it off when I'm accelerating now. I've been planning on buying a new car soon, but I want this one to last just a little while longer.
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I just purchased a 2013 FX4 with a 3.5 Ecoboost and it seems to start strange compared to other vehicles I have owned. With this truck when you hit the key (warm or cold engine) it sounds like the engine turns over for maybe 1-2 seconds before firing where other vehicles I have owned pop right off starting almost instantly.
Is this typical of the Ecoboost motor? I asked the dealer I purchased it from (large used truck dealer, but not a ford shop) and they said that they all do that...seems odd.
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I have 2008 VR6 4 motion wagon with about 98K miles. It has been relatively trouble free and I love the car. To try and make it last I am trying to stay on top of maintenance. I had a VW warranty until 72K and got several things fixed along the way. But, I had asked about the one weird thing it does well before it went out of warranty to no avail ("no trouble found").
The weird thing is that sometimes it sort of stutters when I slow down from a high rate of speed quickly, like exiting a freeway. I described it to my new mechanic (no longer beholden to the dealership mechanics) when I was speculating a new transmission might be in order at some point and he said it was probably an issue with the program that tells the transmission when to downshift and to ask about a software update. I did; none available.
Is it firmware related, how to get it fixed?
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If the selector switch is in 2WD, should the front wheels spin freely if they are off the ground? In other words, should I be able to spin the wheels and they have at least one revolution from the force of the spin?
The reason I ask is that I'm hearing a "whirring" noise at slow speeds in 2WD. When switching to AWD mode, the whirring gets louder. I don't hear the normal clunk/click while it engages/disengages. I suspect, the hubs are engaged somehow.
I jacked up the front end so the front wheels were off the ground. Neither will spin (even allowing for slight friction from the brake pads). To make the front wheels rotate, I have to put a lot of force and there is a lot of resistance. My gas mileage is also dropping.
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Just 2 months old car with 1100 miles on it suddenly chokes, vibrates profoundly when it slows down from high speed and turns the check engine malfunction light on ...
Dealer checks and finds following codes P0171(too lean), P0441 Purge & P0455 Gross leak ...
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I bought a 6,000 mile RX back in december and notice the vibration at slow acceleration.
It sounds like it's coming from the rear of the vehicle. It stops when it gets up to speed. I looked for anything lose and don't notice anything underneath.
I'm not too impressed with my local dealer so far to have them look at it. It sounds as if something is loose inside the muffler. It does not vibrate upon rapid acceleration.
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