Oh, so your symptoms is same as mine? It happens only about to dead stop, besides I am in HK too and there are no choices on Ferodo for 996TT.....

 

Yes. Since the car is not my daily drive, I tolerated that for almost 2yrs.
You have done pads, discs and brake fluid at the same time, I am not 100% sure that is the only cause, but it is easy for you to swap back to your old pads and try.

Nothing wrong with DS2500, I had used it on my previous car. The DS3000 bites disc very hard. You bought the pads from Sanwa in Kowloon City?

 

There is not DS3000 for 996TT in Sanwa, yes I bought there and even there is, I wouldn't pick it too, it squeeze like hell, I don't drive my TT daily but I don't think I could get used to it.

Besides, will you join the P club track day on next week? I will go ZIC on Jan.

 

I am not going.

Haven't been to the track for almost 2 years. Who is organizing the track day in Jan? Zhuhai is very hard on brakes.

 

my car does the exact same thing. its been happening less and less though (I did get new pads and rotors for the car (stoptech.)

 

Targa racing, is the first join using the TT, maybe will have another set of pads ready and swap there if needed.

 

Oh really, how many miles you have them on until now?

 

I could confirm now it is the ABS kick in, as the PSM ABS light on now and the plusing is gone V_V, so.......doesn't it looks like the speed sensor issue?

 

guys i am still having this problem.
ive managed to put around 1400 miles and i still have the same pulsating issue. it only happens when going REALLY slow.. 15 mph coming to a slow stop.

 

In the OP's case, I am pretty sure that the problem was that he hadn't bedded his pads and mated them to the rotors. I don't know if he ever did. I gave up asking him about it.

How about you? Have you bedded the pads?

Jon

 

ive bedded the pads the way suggested by stoptech and a few more for good measure. (a bunch of 80/100mph-10mph runs).


AND i just replaced an abs/speed sensor on the same side.

 

I came across this old thread when researching a similar "pulsating/ABS" type issue I am experiencing on my car after upgrading to Stoptech 380mm BBK with ceramic pads this past weekend. It is very annoying because it only happens at lower speeds as I'm about to come to a full stop under medium/slightly hard braking.

Did you ever determine what the problem was, i.e. speed sensor, bad bedding, pads, etc? Should I go get the discs re-surfaced (even though the disc are brand new) and try re-bedding them? Or, can I just try going through the bedding process again? The brake pedal feel of the bigger brakes is great, but then the ugly pulsating/ABS issue rears its head! Any suggestions on how to address the problem will be greatly appreciated. Thanks

 

My car use to do the same thing at low speeds.. but that was forever.
i replaced the sensor, the wiring harness, and im installing a new abs/psm unit this week..... not fun. im keeping my fingers crossed.

 

could be bad ABS sensor, could be wrong tire sizing.... too tall of a rear. could be the ABS control unit acting up.....

 

Background info on my brake situation to see if this helps anyone with thoughts on what may be the problem and hopefully figuring out the solution:

Tire/Wheel size: 19 inch (front/rear) Techarts with Michelin PS2s tires in the following sizes as per research on this forum: 235/35/19 front; 315/25/19 rear.

Suspension: Pss9 on stock sway bars.

Prior brakes: Stock 4-piston brakes with ceramic pads and stock rotors. I had no pulsating/ABS problems with the Pss9 suspension, stock brakes and 19 inch wheels/tires combo prior to the brake upgrade

Replaced stock brakes last weekend with Stoptech BBK 6-piston brakes, 380 mm cross-drilled 2-piece rotors, and ceramic pads for street use. I am not using the brake pad wear sensors on the pads. I did not remove the wear sensor wires, so I zip-tied them to the speed sensor line.

Bedded the brakes as per Stoptech's instructions, twice on different days with very light use in between. Brakes were pulsating from the get-go as I was bedding them in the first time. So, I bedded them in again the following day, but a little gentler in order to avoid the pulsating during the second bedding process. No luck. Still pulsating/ABS problem.

Any ideas anyone? Should I not zip-tie the pad wear sensor to the speed sensor; try different pads; replace the speed sensors; etc.

I'm going to put my car up on my lift this weekend to make sure that I didn't disconnect and/or damage the speed sensors during the initial install.

Any suggestions appreciated. Thanks