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Old 10-26-2013, 03:28 AM   #31
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poor you. i really hope you sort it out quick. if that happened to me i would be furious.

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Old 10-26-2013, 05:32 AM   #32
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Yeah it's entirely possible that the OP simply didn't react until it was too late and the vehicle had peeled out...but he remembers slamming the brakes and assumes that's what the tire marks were from. But....twice?

The fact that it happened twice in a row makes it really unlikely that he was just mashing the wrong pedal or the pedal was stuck. Either something is very wrong with the throttle in that Jeep or he's covering for a young kid that happened to grab the keys and hop in to play.
That's what I think. This is some serious shit, and DBW sucks! I'm glad no one got hurt. If it was mine I'd call a lawyer BEFORE I had Jeep flatbed it back to the dealer. I'd get everything documented and sue, they'd be paying for the repairs, the Jeep and a whole lot more.

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Old 10-26-2013, 06:33 AM   #33
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I believe ya. I've noticed recently pulling into parking spaces that my jeep will surge before coming to a stop. It kind of feels like a transmission is going from second to first and when it does this it's sort of jumps forward. Kind of scary, but mine does not sound as violent as yours did.

As reference I only have 1200 miles on my JKU.
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Old 10-26-2013, 06:36 AM   #34
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A floor mat didn't happen to get stuck under the accelerator pedal area, did it?
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It ended up being people with thick winter slush mats.
Exactly what I was suggesting may have happened here.
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Old 10-26-2013, 06:47 AM   #35
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I have heard of this happening before. Once. During a wheel on wheel demonstration. The jeep was a 2012 2dr rubicon, 6sp. 4.10s, 3" lift on 35s. The driver was going to back down off the jeep he was parked on. His jeep was in 1st gear, hand brake applied, engine. Driver was posing by the jeep for photos for a local new story. The driver got in his jeep, still in 1st gear, hand brake on, he pushec in the clutch AND applied the foot brake. Also, the jeep was in 4lo with lockers on. When the jeep started it was at full throttle instantly and took off. Even with the clutch in!!! The brakes are not strong enough to stop a jeep in 4lo that is at full throttle. The driver is a VERY experienced offroader. Anyway, a very tragic event occured. An investigation followed. Chrysler said the jeep was at full throttle at start up and they don't know why. Driver was found to not be at fault and no charges laid. The jeep has done this "full throttle surge" again while cruising the streets. Chrysler still finds no issue.

Just relating a local story to the OP. yes I kept out some details,out of respect for those involved in the incident. Please do not post any speculative comments. Thank you and stay safe folks.
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Old 10-26-2013, 07:41 AM   #36
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I have heard of this happening before. Once. During a wheel on wheel demonstration. The jeep was a 2012 2dr rubicon, 6sp. 4.10s, 3" lift on 35s. The driver was going to back down off the jeep he was parked on. His jeep was in 1st gear, hand brake applied, engine. Driver was posing by the jeep for photos for a local new story. The driver got in his jeep, still in 1st gear, hand brake on, he pushec in the clutch AND applied the foot brake. Also, the jeep was in 4lo with lockers on. When the jeep started it was at full throttle instantly and took off. Even with the clutch in!!! The brakes are not strong enough to stop a jeep in 4lo that is at full throttle. The driver is a VERY experienced offroader. Anyway, a very tragic event occured. An investigation followed. Chrysler said the jeep was at full throttle at start up and they don't know why. Driver was found to not be at fault and no charges laid. The jeep has done this "full throttle surge" again while cruising the streets. Chrysler still finds no issue.

Just relating a local story to the OP. yes I kept out some details,out of respect for those involved in the incident. Please do not post any speculative comments. Thank you and stay safe folks.
Dude if you don't want comments - then don't post.

I'm sorry there was a very tragic event....but don't understand how a Jeep can instantly take off with the clutch in. With drive by wire, full throttle is understandable - electronics can fail. Doesn't make sense, unless his clutch was fried and putting clutch in did nothing....
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Old 10-26-2013, 08:20 AM   #37
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Wow- I glad no one got hurt. Drive by wire sucks. What was wrong with linkage? Was it eliminated to cut costs?
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Old 10-26-2013, 09:11 AM   #38
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So after what happened in forward you chose to try reverse without even a thought it could surge again and maybe I better leave my hand on the shifter so neutral is imediately available? Or a thought you may need to turn it off instantly so keep your hand on the key? I'm not saying its your fault but this sounds really strange to me. Nobody is just going to ride it out when they have just been through the forward ride and thought they would give reverse a go.
This does make sense but sometimes when taken off guard you just lock up. I took a D6 cat Ice skating once. I was pretty new on the machine only driven it a couple days for a hour or two. I was tracking up a very icy hill helped pull our rig up the hill. Then when I went to go down I started turning and as soon as my tracks were perpendicular with the hill I took off. It was FREAKIN scary I started going wayy too fast in a giant heavy dozer sideways out of control towards a ledge. I didn't do anything just sort of did the deer in in the headlights. Bounced off a snow bank and gained traction luckily. Thinking back I should've just went down backwards or at least when I started sliding drop the blade and the rear claw. Anyway point is I can see how OP may not have been on the ball I know I wasn't.
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Old 10-26-2013, 09:15 AM   #39
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Where's the OP? Any new info on this??
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Old 10-26-2013, 09:30 AM   #40
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I'd like to say to the OP that like others said, everything else is replaceable, so we are glad to hear the vehicle came to a stop without any severe injury or human loss.

Not many of us will have the presence of mind to do the right set of things when we are in a state of shock. It's awareness of such incidents/possibilities and the anticipation that you develop, that will improve your chances of taking the right steps when the unexpected happens.
In a case of unintended acceleration, a combination of shifting into neutral and breaking hard should stop the vehicle. One has to en-grain this thought to increase the chance of reacting that way. I know Toyotas had implemented the electronic throttle brake override mechanism once they had these similar complains. It obviously seems as though that feature doesn't exist in our jeeps or didn't trigger in the case of the OP. These systems are supposed to kill the electronic throttle if the brake is fully pressed.

Many may have seen this youtube video of the highlander crashing into a garage. Again a similar example of the issue happening not once or twice, but 4 times (F,R,F,R) on that drive way until it came to a stop. Goes back to my comment that when you are in shock you may not really be doing the right things. Also check out if anyone sees the brakelights lighting up in this video:
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Old 10-26-2013, 09:52 AM   #41
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All,
Here's my story:
2014 Jeep Wrangler, bought on August 29, 2013 in Tucson AZ.

Incident occurred on Sunday, October 13 at noon.

I was on our driveway, approaching our house and had pressed the garage door opener. I was moving slowly forward into the garage, and about 4 feet from the opening of the garage, the jeep suddenly lurched forward and made a loud revving noise as it accelerated into the garage. I stomped my foot on the brakes, but it still slammed into the garage wall. There are brake skid marks all along the garage floor.

I was completely shocked by what had happened, and thought that the best thing to do would be to back off the wall a little, park the car and go into the house to phone for help. I put the jeep into reverse, and it again revved suddenly and shot backwards at a high rate of speed. It shot back about 30 feet, running down a rocky embankment in front of our house, taking out two mesquite trees, and slamming into a concrete structure holding our mailbox.

The mailbox structure was shattered, and in the house, the wall that was hit was knocked inward. Pictures and lamps inside the house were knocked over. I sustained chest injuries and whiplash. My doctor was surprised that the airbag had not deployed.


The Chrysler "forensics" technician went to the auto body shop on yesterday, then came by the house to see the site of the accident. Not sure what will happen.


Has anyone experienced anything like this?
To be serious, yes I have and after ten years I can still describe the event step by step.

I think your doctor may be on to something... with chest injuries and whiplash, I'm also surprised the air bag didn't deploy during the mayhem. Head on, you almost took out a wood framed wall and then at full throttle backed into an eight inch block wall - moving a 12" concrete foundation. The pictures show significant damage to fixed building structures without one safety device deploying on the Jeep to protect the driver.

This is total system failure IMO, like the Jeep had a mind of its own.

I have a few questions, let's start with these first.

1. Which foot was on the brake pedal?

2. When you hit the wall head on at full throttle, your foot firmly planted on the brake pedal, what came next? The engine was racing with the rear tires screeching.. did it just drop to idle, did the engine die or did you turn the motor off?

The answer to those questions would be helpful.

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Old 10-26-2013, 10:03 AM   #42
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Also check out if anyone sees the brakelights lighting up in this video:
Yes at the very end. Was this a foot on wrong pedal incident?

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Old 10-26-2013, 10:31 AM   #43
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When you are dealing with electronics and drive by wire anything is possible.
Mine did a little something weird a while back on a trail ride.After making it up a steep hillside obstacle I parked on a somewhat steep trail pointed up the hill .Got out to help others up and take pictures. When we got back in the Jeep I started it up and put it in D was already in 4L. When I let off the brake pedal it coasted backwards and the engine freewheeled.I thought I had bumped the transfer case out of gear so I looked down and it was indeed still in 4L.Put it in park and then back to D again same thing.I put it in park and shut it off and tried again and it was fine.Its never done it again and I still dont know what caused it.

The manual Jeep involved in that fatality accident I have an idea what went wrong. I have seen it before on farm machinery and semi trucks.If you get them in a bind or under extreme load the clutch can not disengage. That Jeep was flexing the suspension and probably twisted frame enough to load or twist the driveline to the point the clutch could not disengage.It doesn't happen often but it does happen. The old Mack trucks were notorious for the fuel pump breaking loose inside and feeding all the fuel to the engine and then the clutch would lock up and not disengage and the brakes would not stop it most times it was a very bad ending.
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Old 10-26-2013, 11:09 AM   #44
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Yes at the very end. Was this a foot on wrong pedal incident?

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That's my observation too. Probably there was a malfunction, but I think she gunned down it in panic making it worse??
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Old 10-26-2013, 11:26 AM   #45
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When you are dealing with electronics and drive by wire anything is possible.
Mine did a little something weird a while back on a trail ride.After making it up a steep hillside obstacle I parked on a somewhat steep trail pointed up the hill .Got out to help others up and take pictures. When we got back in the Jeep I started it up and put it in D was already in 4L. When I let off the brake pedal it coasted backwards and the engine freewheeled.I thought I had bumped the transfer case out of gear so I looked down and it was indeed still in 4L.Put it in park and then back to D again same thing.I put it in park and shut it off and tried again and it was fine.Its never done it again and I still dont know what caused it.

The manual Jeep involved in that fatality accident I have an idea what went wrong. I have seen it before on farm machinery and semi trucks.If you get them in a bind or under extreme load the clutch can not disengage. That Jeep was flexing the suspension and probably twisted frame enough to load or twist the driveline to the point the clutch could not disengage.It doesn't happen often but it does happen. The old Mack trucks were notorious for the fuel pump breaking loose inside and feeding all the fuel to the engine and then the clutch would lock up and not disengage and the brakes would not stop it most times it was a very bad ending.
Interesting theory about what happened. Sounds plausible, thank you. Many local Jeepers were shocked to learn that in 4lo with the jeep in 1st gear, it will start without using the clutch. Turn the key and it's moving. It is designed to do this. Your explanation as to why it would move with the clutch in is very plausible. I still do not understand why it would be at full throttle right away. These are the only 2 cases I have heard of wranglers (JK) suffering this type of failure.
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Old 10-26-2013, 11:28 AM   #46
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The right foot was on both the brake pedal AND the accelerator....The harder the brakes were mashed, the harder the accelerator was mashed. I've done it several times myself. Once I backed all the way into the car behind me and smashed his front end up pretty badly.
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Old 10-26-2013, 11:38 AM   #47
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That's my observation too. Probably there was a malfunction, but I think she gunned down it in panic making it worse??
Well, first, notice many of these incidents have something in common... the malfunction seems to happen at low speed, at home and in driveways or parking lots. Many unintended acceleration issues I believe are provoked. I doesn't mean there wasn't a malfunction, it just means the driver did something that led to the malfunction and mishap.

For example, in the video the driver was entering the driveway and simply pressed the wrong pedal and crashed into the house. In response, the driver slipped it in reverse while still depressing the throttle. The driver repeated the same sequence until they finally stepped on the right pedal.

The driver was simply disoriented due to the low speed crash... maybe the vehicle that honked stressed the driver.

Usually when a throttle appears to stick you stand on the brake, slip it in neutral and shut the motor off... that's what I did.

I still have the crease in my rear bumper as a reminder what happened that night.

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Old 10-26-2013, 11:40 AM   #48
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The right foot was on both the brake pedal AND the accelerator....The harder the brakes were mashed, the harder the accelerator was mashed. I've done it several times myself. Once I backed all the way into the car behind me and smashed his front end up pretty badly.
That is similar how my unintended acceleration happened. I was pissed when it happened.

My left foot was on the brake and right on the throttle. Right after I put it in reverse.

BAM... Hit a la bamba.
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Old 10-26-2013, 11:43 AM   #49
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My Jeep, ('13) accelerated on me one time. I was coming out of a small sandy arroyo. No 4WD needed, you can drive a regular car across it. As I crested coming out, the Jeep suddenly took off. I quickly nailed the brake pedal, the Jeep seemed to slide a little bit on the dirt. Just as quickly the rpm's came down and it was over. No I did not hit the gas pedal! My foot was locked on the brake. No floor mats to mess with the skinny pedal. I have many times gone over the incident in my mind and still can't figure out what happened. I've often read about something like this happening to other people and just figured it was driver error. It happened to me and I still don't know what happened.
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Old 10-26-2013, 11:44 AM   #50
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The right foot was on both the brake pedal AND the accelerator....
That requires an intentional and skillful act in my 2013 Wrangler (manual, if that matters). The gas pedal is much further away from the driver seat than the brake pedal. This is probably intentional to avoid the situation you describe, and to make the brake easier to get to than the gas.

Unfortunately, this makes "heel-toe" downshifting very difficult.
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Old 10-26-2013, 12:21 PM   #51
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My Jeep, ('13) accelerated on me one time. I was coming out of a small sandy arroyo. No 4WD needed, you can drive a regular car across it. As I crested coming out, the Jeep suddenly took off. I quickly nailed the brake pedal, the Jeep seemed to slide a little bit on the dirt. Just as quickly the rpm's came down and it was over. No I did not hit the gas pedal! My foot was locked on the brake. No floor mats to mess with the skinny pedal. I have many times gone over the incident in my mind and still can't figure out what happened. I've often read about something like this happening to other people and just figured it was driver error. It happened to me and I still don't know what happened.
My Mustang would do this but only from a cold start. I would turn the key to start with my foot nowhere near the gas. The RPMs would go high. I would brake and shift into drive. The car would start moving. Not rolling but driving (and I do not live on an incline). It wasnt a vicious full throttle full speed ahead 0-60 type acceleration but it would hit 10-15 mph. I could make it all the way out of my apartment complex without ever hitting the gas just steering. Right about where the street entrance is the RPMs would come down, and all was normal. I thought it was haunted. I could stop it by hitting the brake tho if I wanted to. Of course it wasnt in 4wd lol and I drive automatic.
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Old 10-26-2013, 12:30 PM   #52
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What year Mustang? ... Most vehicles have an automatic choke. Low and high idle adjustment when cold.

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Old 10-26-2013, 01:15 PM   #53
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Sounds like driver error.

As for no airbags, the fronts wouldn't deploy when going in reverse. Why they didn't go off when the front wall was hit is due to their not being enough force / speed.
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Old 10-26-2013, 01:25 PM   #54
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Sounds like driver error.

As for no airbags, the fronts wouldn't deploy when going in reverse. Why they didn't go off when the front wall was hit is due to their not being enough force / speed.
True. Current generation airbags deploy based on the delta V experienced by the vehicle. This means the change in velocity. There is no button or switch hidden in the bumper. The fact that the wall studs did not snap and that only the plastic bumper cover is deformed a little tells us that the velocity of the vehicle was not as high as one would think. Imagine if you could swing a 4000 lb hammer at a couple of 2x4's. They will easily break if the velocity is high enough.
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Old 10-26-2013, 02:04 PM   #55
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I had this happen in my 13 wrangler. I was leaving for work one morning and my jeep just accelerated across the parking lot. even with the brakes applied it was trying to go. I could press in the clutch to stop it but the moment I took my foot off it was trying to fly again. I chalked it up as a cold Rocky Mountain morning and it has never happened again.

now on the other hand I feel like the jeep has a lack of power. I've had to use 4L to get up small hills and even the edge of a logging road one time that was no more than a bump.
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Old 10-26-2013, 02:20 PM   #56
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I still question all of this...

But I won't deny that pulling into parking spaces and doing wide steering at very slow speeds has caused my '13 to surge slightly a few times. Not enough to throw me anywhere but enough that I need to hit the brakes to stop from going forward past the parking space.
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Old 10-26-2013, 02:28 PM   #57
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Probably went to hit the brake and missed and hit the gas. Happens all te time.
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Old 10-26-2013, 02:50 PM   #58
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1300 miles on our brand new 2014 JKUR, 24 days old.

1) Subscribed to this thread waiting to hear any and all results from the Chrysler guys.

2) Wife is 100% grounded from driving the new one and will only be driving our 87 without Fly By Wire throttle. It has a cable and linkage.

THIS IS SCARY!!!!! Thanks for posting.
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Old 10-26-2013, 03:10 PM   #59
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I don't think anyone should be panicking. All cars can have sudden acceleration or surging issues. Statistically drive by wire is no worse than cable linkage. One issue is drivers knowing what to do when it happens and handle it accordingly as others have done during their experience. As I posted before one of my Hondas started surging to 3000 rpms and would just take off when you let off the brake. While troubleshooting I observed tlhe cable linkage was not moving on its own or stuck. It turned out to be the idle air control valve.
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Old 10-26-2013, 03:19 PM   #60
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Many times, similar but not that drastic. backing out of a parking space every day, with the wheel turned full tilt, for whatever reason there is a surge when you lock the steering left or right. You back up keep turning, keep turning, turn as much as possible, (locked) and the vehicle surges. Like turning and locking the turn inputs gas.
When you full lock the steering wheel, the power steering pump puts additional load on the engine. The computer senses the drop in idle speed and try's to bring it back up to the recommended RPM. You then back off the lock position of the steering wheel and the engine surges a little till the computer can slow it back down. That process is not a fast as the driver would like because we can feel the surges and it makes "ME" weary of sudden, unexplained acceleration. Solution, don't hit the locks in the steering wheel. Stop about 1/4 turn before you hit lock. It's hard on the pump and entire steering system anyway.

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