Andy804

I am getting a similar issue on left hand turns as well in my 2003 C4S with under 39,000 miles. The PSM activates inappropriately causing a very sudden and unexpected feeling that ABS is activating during even mildly spirited driving in my 2003 Carrera 4S that I acquired about a year and half ago. Occurs during left hand corners at mid-corner or just after mid-corner. This makes the car feel as if it’s going to understeer off the road. Occurs for a split second with PSM light coming on and then off for that split second. My foot is never on the brakes when this occurs as I’m usually rolling onto the throttle by midcorner. Doesn’t do it at lower speeds around the city but occurs when driving spiritedly in the canyons (but I should add that I’m not pushing it anywhere near its limit). It’s recently had new shocks, shock bearing plates, and suspension arms and links (all Bilstein and OEM parts) with stock alignment done. Wheels are balanced. Calipers were removed and repainted for cosmetic reasons. Tires are all within five years and appear to have worn evenly. Cold tire pressures 32-33 psi front and 36-37 psi rear. Clutch was changed about 6 months ago due to an unusual wear on the fork and while the shop was in there, IMS Solution was installed. A Porsche independent shop couldn’t reproduce the issue which wasn’t surprising since it never happens on city streets/highway nor has the PSM activation stored any codes. A second (smaller) independent shop says if the first shop couldn't figure it out, he wouldn't be able to. Any thoughts before I start down the rabbit hole of replacing tires and parts (such as the ones mentioned here, Porsche PSM Failure: A Mechanic's Guide To This Common Nightmare)?

I'm having a similar issue with mine but not as extreme. Mine is a 2003 S. With the top down, the rear edge of the cover is about a quarter to a third of an inch too high. I can also push it down a bit but still not quite flush with the rear trunk lid or rear quarter panels. There were some related threads in 986forum about adjustment points but without photos, hard to make out where and what these adjustment areas are.