Hi guys,
I revive this topic, since I have a weird problem.
It all started immediately after I replaced the steering rack.
The same night after the replacement, I took the car for a test on the roads I know well and right in the middle of taking a specific turn that I always use for testing the car, suddenly the ESP kicked-in very abruptly.
At first I didn't give it importance, since I had old tyres and I thought they were the cause.
But now, after having replaced tyres (with Michelin Pilot Sport 5), wishbone bushings and struts (with upper bearing and top mount), the problem persists on the same turn and other similars ones.
I am concerned it has to do with the steering rack replacement. If not a mechanical problem, maybe an electronical problem related to the lack of G250 sensor?
I completely checked all the suspension components. The front axle of the car doesn't show any noticable play. Everything is tight and solid.
To better explain the problem: the ESP kicks-in abruptly when I quickly take specific turns and I have to turn the steering equal to or more than 45°.
The ESP activates on the front caliper external to the direction of the turn. So, for example: if I turn right, it activates the front left caliper and viceversa.
And when it does, it is scary, because it makes an horrible sound and the car suddenly stops accelerating and it abruptly understeers.
While driving I had the impression the problem is more present when turning on the right than on the left, but I'm not 100% sure about this, since it just might be due to the kind of roads on which I've been able to test the car.
I did multiple times the basic settings for G85, G200 and G202 sensors, but the problem is still there.
Recently I replaced the entire rear beam axle with the stiffer GTI one and I installed installed rear axle poly bushes.
This modification increased the oversteering tendency of the car, but at the same time increased the problem explained above.
Now the ESP kick-in more frequently as soon as I quickly take a turn.
What do you think might be the cause of the problem?
Could it be that my ABS unit is coded to use G250 sensor when specific conditions are met?
Maybe I need to modify the ABS unit coding?
No errors are stored in any units.
I'm really stuck.
Any suggestion on how to investigate are much appreciated.