PSM = Phun Stopping Mechanism ?

[wwjd]

Originally Posted by Topless

Inside driver's side door jam will have a plate with the mfg date and stock tire sizes. On the side of the tires you will find the model of tire and size. Knowing your car and your contact patch is the first step in diagnosing a handling problem.

I'll get the details, but pretty sure it is working as designed: to keep me from sliding all over... which is what I like to do, because it is PHUN

[BYprodriver]

Originally Posted by wwjd

I'll get the details, but pretty sure it is working as designed: to keep me from sliding all over... which is what I like to do, because it is PHUN

When I was looking for a Boxster S in 2003 I mostly focused on 2000's because it was the 1st year PSM was available, so easier to find one without PSM. If you turn off PSM it can turn back on during certain "maneuvers".

[wwjd]

Originally Posted by BYprodriver

If you turn off PSM it can turn back on during certain "maneuvers".

wait... ... WHAT??? Surely, this is not true???

[Topless]

Originally Posted by wwjd

wait... ... WHAT??? Surely, this is not true???

True enough. I am betting there is a tire mismatch in sizes or compound causing the PSM to over-react. PS2 on the front and All Season on the rear would certainly cause this.

[wwjd]

Originally Posted by BYprodriver

If you turn off PSM it can turn back on during certain "maneuvers".

Can anyone comment on this? Does off not mean FULLY off for PSM?

[Topless]

Originally Posted by wwjd

Can anyone comment on this? Does off not mean FULLY off for PSM?

Confirmed. "Off" means mostly off unless you activate ABS or slide the car. Then Fritz the magic PSM wizard reactivates to prevent you from hurting your car or yourself. In a 986/987 it is pretty intrusive. In a 981 it is practically unnoticeable but still corrects your line with throttle and brake application.

Can this be completely disabled? Yes but it is complicated and affects many other systems on the car.