BVCRD wrote:
Pablo wrote:
With the CRD and the crapyear tires, the ESP can be dangerous. A couple months ago I was flipping a U-turn and got on the skinny pedal to help motivate me along. I was just finishing the turn when the rear tire broke loose, The ESP kicked in and killed my power. Traffic was heading right towards me. I had to let off the throttle, wait, and then apply it again. The ESP is great sometimes, but that almost got me rearended. The guy behind me had to hit the brakes hard and if the Jeep would have just moved-- he would not have even had to think about braking.
The power reduction lasted for what seemed like an eternity and I could not wait for the d4mned blinking ESP light to stop blinking and give me my motor back. Nerve racking.
I will invest in better tires and hopefully a Detroit Tru-Trac to reduce the risk of this in the future. All I can say is that if you spin a wheel with ESP on while trying to get out of harms way-- you are in deep deep doodoo.
I don't think you should have let off the throttle. It doesn't kill the engine, only slow it down and/or brake the slipping tire. You would have still had SOME momentum. Maybe try a U turn with less pedal and all would go well.
Less pedal... your right, but I had done this 100 times before with no bad result as I had never spun the tire. Which is what makes it so dangerous and why I am afraid it will get someone in a wreck. I was barely moving when ESP shut everything down, so it was not like I was hot-rodding it or going to loose the rear. This is something that can happen to anyone if they are not aware of it.
I think what causes the problem is the sharp angle of the U turn I was going around. Keep in mind I was barely moving when this happened, as I was stopped at first and then going around a median-- making a sharp U turn into the left most lane while entering the lane to the right of that briefly and only slightly. It was something only a small vehicle or a Jeep could do-- must SUVs just don't have the turn radius. Usually when turning this sharp you put the power on early to move the vehicle at the sharper angle and let off as soon as you start to go around so you don't spin a tire. Once your pointed straight, you can put the pedal down again. This time the rear wheel spun on me and engaged ESP at the same time I was letting off the throttle-- leaving me going 10mph in the fast lane with no throttle response. What happened was exactly like Jeger mentioned in his second scenario-- ESP thought the back end was lost so it cut power for a more extended period. Pushing down on the pedal did nothing once this happened!
The only time I had ever experienced this before was when I was delibertly trying to engage ESP. Both in a parking lot and off road, to see how it worked, When I did break the rear end totally loose-- flinging it out to the side for a second at much much higher speeds-- the same power reduction happened along with the wheel braking to bring the rear back in line (anti-roll). Once that happened, the throttle reduction was severe and lasted until the vehicle settled in the direction the wheels were pointed. I think the system reads intertia and has a little fudge factor built in to make sure it does not give you back the go pedal until the forces acting on the vehicle are neutral. This can take a bit of time.
What I take away from this is don't ever get a wheel loose when your vehicle is making a real sharp corner as the ESP will read the extreme yaw rate of the turn, coupled with the tire spin, as the vehicle having totally lost the rear end and it will put the brakes on and kill your throttle until the vehicle looses all yawing motion and is headed in a straight line. This seems a little extreme when you are only going 5-10 mph on a dry road, but how is ESP to know if it is dry or icy? It only knows if the wheel breaks loose. If it does while you have a high yaw rate-- ESP will pull out all the stops. In most cases this is good, but not always.
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as far as messing around in the snow goes... if you turn it off and start the slide the small amount that remains on doesnt effect it at all. now with big tires and lift my snow antics are over with.. too dangerous 
