Engine Surge During Braking

[jdpasko]

Jan/2023 traveling at 55mph, a vehicle swerved into my lane which required immediate braking. Applying the brake, my 2022 Jeep Wrangler's engine surged, and Jeep would not slow down. I reapplied brake and initially it didn't slow my vehicle. After re-reapplying the brakes, the Jeep responded to the braking.

On Mar 28, 2023 traveling approximately 20 mph in a vehicle round-about, following a pickup truck which was two car lengths ahead of me and suddenly the pickup stopped for a pedestrian. Seeing the pedestrian and anticipating the stop, I applied my brakes on my Jeep Wrangler and the engine surged, the Jeep sped forward, I reapplied the brake but my Jeep wouldn't stop until it crashed into the rear of the stopped pickup. There was no damage to my Jeep but some rear bumper damage to the pickup.

During both incidents the ESS (Engine Start/Stop) was disabled.

I have reported this safety issue to the NHTSA. I called by JEEP Dealer in SoCal and they will not be able to see my vehicle until 4/17. This is totally outrageous. I need the codes downloaded for documentation as to this safety situation.

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[Retrograde]

Not the first time throttle surging has been mentioned on this forum:

https://www.jlwranglerforums.com/forum/threads/2021-jlur-wont-coast-downhill-in-4lo.96322/

Different from what you described... But in one instance, it, in combination with anti-lock brakes that didn't work, caused me to slide in snow and run off the road.

Watching this thread for updates.

 

[diesel_dave]

Even at full throttle, the braking system can easily overpower the engine and bring the vehicle to a stop so there would have to be multiple failures in multiple systems occuring at the same time for this to happen.

Or you accidentally pressed the gas pedal instead of the brake pedal as is the case in like 95% of these events. Would be interested to see the data in the EDR to see what % throttle and brake were applied at the time of the collision.

 

[Ten North Prez]

I've noticed something similar with my MT as well. I have a fairly steep driveway and i will sometimes throw it in first gear and just let the Jeep idle down (typically when there might be a little snow). On more then one occasion the engine surges with my foot not even touching the accelerator. I just push in the clutch and all is better, but it is almost as if the engine surge is to keep the back wheels from locking up.
I absolutely hate all this electronic "drive-for-me" crap they put on cars these days. I assume that is what causes my particular issue and I can see instances in off-roading when this could be very bad.

 

[Monk51]

This happened within the first 6 months after purchase.

My experience, driving on a chip and seal road about 30 mph. Pulled off the road and hit the brakes and had a surge and braking situation happen. I wasn't going very fast so got stopped with emergency brake.

I won't go into all my own examination of this trying to figure out what happened. I had a couple more similar experiences before finally figuring it out.

I have big feet and I was hitting the brake and accelerator at the same time. After some practice it has never happened again.

 

[TheAwesomeEr]

Watching this thread - wondering if it's similar to what we're discussing here:
https://www.jlwranglerforums.com/forum/threads/engine-surge-when-i-step-on-the-brakes.38563/

 

[Marvin Cohen]

Jan/2023 traveling at 55mph, a vehicle swerved into my lane which required immediate braking. Applying the brake, my 2022 Jeep Wrangler's engine surged, and Jeep would not slow down. I reapplied brake and initially it didn't slow my vehicle. After re-reapplying the brakes, the Jeep responded to the braking.

On Mar 28, 2023 traveling approximately 20 mph in a vehicle round-about, following a pickup truck which was two car lengths ahead of me and suddenly the pickup stopped for a pedestrian. Seeing the pedestrian and anticipating the stop, I applied my brakes on my Jeep Wrangler and the engine surged, the Jeep sped forward, I reapplied the brake but my Jeep wouldn't stop until it crashed into the rear of the stopped pickup. There was no damage to my Jeep but some rear bumper damage to the pickup.

During both incidents the ESS (Engine Start/Stop) was disabled.

I have reported this safety issue to the NHTSA. I called by JEEP Dealer in SoCal and they will not be able to see my vehicle until 4/17. This is totally outrageous. I need the codes downloaded for documentation as to this safety situation.

I am curious, has there been any update on this? I had an almost identical experience, and my dealer said he couldn’t find anything wrong. I have lost confidence driving the car. Glad the pick up truck was the only casualty.

 

[Bubsjeep]

This just happened to me in my 2021 rubicon . I was leaving a parking lot and stepped on the brake and the engine surged and pushed me out into traffic. At first I thought I slid on the ice but I could feel the jeep surge forward and hear the engine rev. Luckily the pickup coming down the street swerved and miss me.

 

[Wabujitsu]

This is a pretty common error that many drivers make - inadvertently pressing the accelerator with part of your foot while applying the brake with the same foot. I have done it more than once. What happens is exactly what everyone describes here.

Usually the correct explanation is the simplest one. When you hear hoofbeats, don’t think “zebras” - think “horses.”

 

[smokeythecat]

This is a pretty common error that many drivers make - inadvertently pressing the accelerator with part of your foot while applying the brake with the same foot. I have done it more than once. What happens is exactly what everyone describes here.

Usually the correct explanation is the simplest one. When you hear hoofbeats, don’t think “zebras” - think “horses.”

Indeed. I experienced this while backing up into my garage. I was lucky I didn't crash into the storage cabinets. Upon further reflection I'm pretty darned sure it was my big, clunky hiking boots pressing both pedals at the same time. Fortunately the braking side won.

 

[Wabujitsu]

Indeed. I experienced this while backing up into my garage. I was lucky I didn't crash into the storage cabinets. Upon further reflection I'm pretty darned sure it was my big, clunky hiking boots pressing both pedals at the same time. Fortunately the braking side won.

How many old people a year drive into the fronts of stores because of this? Isn’t it odd that ALL brands of vehicles have been blamed for this by the drivers? What are the odds that multiple brands of vehicles have the exact same malfunctions of multiple, unrelated systems failing simultaneously???

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