I purchased a 2002 Escalade AWD all stock about three months ago and really like the styling. However, driving performance is another issue. Any time when going over a moderate size "crack" in the road the motor goes back to idle and the high compression engine acts as a brake and literally throws me forward. I assume this may be a problem with the Stabilitrak system but am not sure. If this is a "normal" way the system works I find this hard to believe. I had the same model type Tahoe and this never happened. The car is still under factory warranty and I will be taking it to the dealership but I thought I would at least show up with an idea of the problem so I don't hear the dreaded "we can't replicate the problem." Also, if anyone knows a good Cadillac service department in Westchester New York I would be happy to know. Any ideas or suggestions would be appreciated. Thanks.

Welcome to the forum :) If you are on the gas and hit a large "crack" in the road you maybe feeling traction control, but if you are feeling this often you have a problem. What tire pressure are you running? If you have your tires real hard (over inflated) you will get this more often too. :)

hcvone thanks for the reply. I have the stock Goodyear Wrangler HP 275/70/17. The door pillar says 30 psi. The tire says 44 psi. I have incrementally gone between these two numbers and have noticed no real difference. This problem happens ALL the time. I notice it most when on the gas leaving a stop. Any small undulation in the road causes this problem. As it hits a bump it literally feels like the motor is skipping. It is really annoying and I hope someone can give me a little help. Thanks.

The stock tires (I just put back on to trade in) run best at 33-35 lbs, 44 is too hard for those tires on the stock rims, but if you are having the problem all the time I would get it in the shop ASAP, you may have something broken because what you are describing is not normal.

Here's a dumb theory. I believe that the "fly by wire" throttle was started in '01 right? What if there is some wiring issue between the pedal sensor and the throttle body control or computer.

I don't know if this system is tracked with the ODB-II computer, but if you can reproduce it, I imagine a test drive with the "goodwrench" dude's ODB-II handheld monitor ought to see it happen.

I had an ODB-II kit that worked on my Palm Pilot, and came with the adapter to plug it in. I could go into a number of things in the computer to see any faults that were stored, etc. I think I remember that one of the things it monitored was the throttle position.

Good Luck!

He is saying it only happens when he hits a crack or bump in the road, it sould more like a traction issue or suspension, but who knows. :)

What I'm thinking is that the bump or jolt is affecting the TBS (throttle body sensor). Although electronic in nature, there is still a mechanical motion being used, and if there is a drop in the signal going to the computer, or to the TBL, then it would explain the problem. The ODB-II should be able to see (or the mechanic) could see this drop, and isolate it as one of the components.

Dave

Off topic - the drive by wire system in my 2002 is totally different than in any 03+ I've driven. My dad's Yukon (05) has a totally different feel, it feels more removed from the road. *end hikack*

But yea, take it to the dealership, that sounds like a safety problem.