If this has as much to do with larger tire size as lift, the only real thing to alleve situation would be to make sure wheel is dead-on centered, upgrade tire size in computer(which i think only goes up to 32 like the rubicon), and hope a fix comes out for the computer so the ESP is not so sensitive. But as far as lift height maybe that doesnt make as much difference from what im reading.

It would be interesting to maybe do a poll on tire size vs. ESP activation problems, or for lift + tire size and ESP level of problems. Maybe wayoflife could set something up in regards to that. I dont know how to do it.

 

Yea, a poll might help. Who usually comes up with the updates for the computers for the larger 35"+ tires. I was going to contact a local 4WD shop to see if they had any other suggestions.

 

I am running a Rusty's 2" suspension lift with 33" tires and no problems.

 

I'll let you know on this soon. I'm in the middle of installing the FT ultimate kit on mine

 

I'm running the 4" superlift with 35's and no problems...and I'v tried to get it to activate..

 

I've been thinking about this and I have a few thoughts to share.

The only qualification I have for posting this is my ability to type, meaning it is all just guessing, but may get someone elses juices flowing.

Now, as far as ESP, I am guessing that there are individual wheel speed sensors, lateral acceleration sensors, body roll sensors, steering position and likely some others.

Most people modify jeeps with:
1. Larger tires - this would, as everyone knows, result in the Jeep computer thinking the vehicle is traveling slower than it actually is.

2. Wheel spacers - These change the track of the vehicle. I am guessing that this results in inside/outside wheel speeds during a turn that are different from what the Jeep computer is expecting to see.

3. Lift - This changes the center of gravity, lifting it up, making the vehicle more top heavy, again, as everybody already knows.

Now, putting this together.......

You go through a curve, the larger tires result in the computer thinking you are going 40mph when you are actually doing 45mph, the body roll sensor is sensing "roll" for a 45mph(+) roll PLUS more since the center of gravity is higher than stock AND the computer doesn't like the wheel speeds it is seeing since the ratio between the inside wheels and outside wheels is different. Plus, I am guessing the steering input has a play in this also.

With all of this, the computer thinks your in more serious of a situation than you are (because the body roll is excessive for the reported speed under the steering input) and kicks off the ESP to get things back under control.

I am going way out on a limb here, but just guessing that those with the most ESP problems are the aggressive drivers that are running a low backspacing (through wheel or spacers), moderate lift and larger tires(say 35's and higher) and may not have the steering wheel dead on. Further, the original tire size, again guessing, that a X that came with 225's and not get flashed for tire size may be even worse. I think a multitude of things come together to kick this off and take one or two things away, and you have the "no problems" that others report.

Does this make sense to anyone else?

 

Cdash- Very good perception. The ESP may be a little annoying at first, but it does not take away from the driveability of the Jeep when it does activate. I have learned which corners activate the ESP and have slowed down through those particular corners. This is something that I can definately live with. The advantage that the BLD gives in off road situations far outweighs the drawbacks of the ESP kicking in on the road.

 

Please do!!! I have the FT ultimate kit on order with Northridge 4x4 and hope to see it delivered soon... I'm anxious to hear what you think!

 

I think you're probably dead on.

Now, when the ESP light comes on (in these situations where it probably shouldn't), does it actually affect the way the Jeep handles, or is it just annoying to see it come on? If it isn't even noticeable (besides the light) then I definitely agree with Renegade - there are enough benefits to the system that would cause me to see this particular issue as fairly minor.

If, however, the system kicks in with enough force to actually cause the driving situation to become more dangerous... then obviously that's a big deal.

 

Sure seems like there has to be a solution for this, but the problem is how long will we have to wait before either Jeep, the aftermarket companies, or someone else figures out the bestworkaround. Like to hear more from folks that are having zero problems with there lift and tires also.

thanks