Lost bakes at Barber yesterday - questions
 

I have a 2007 NC. My SS braided brake hose developed a crack at the fitting near the caliper and I lost fluid and front brakes in turn 5 at Barber. The rears slowed me down enough to stay out of the gravel pit. I assume I now have air in the ABS system. Is that a good assumption? If so, do I need to have special tools get out air? I have a Motive Power Bleeder.

I have always bled my system like any other non-ABS system, being careful to keep plenty of fluid in the master cylinder. Never had any problems. I've read threads on bleeding ABS, but none are specific to the NC system. Thanks.

Need to burp the ABS pump. Dealer plugs an SST in to cycle the pump. Some cars will briefly power the pump when the car is powered up. NA/NB don't. Not sure about NC. Some techs will "jump" the ABS pump to cycle it. I don't know how to do that.
We generally just drive the car down the street with some junk tires on and purposely stab the brakes to engage ABS. Do this a few times and you'll feel the pedal come up a bit. This will push any air out of the pump and out to the calipers where it can be bled. So full bleed, drive car to cycle pump and re-bleed. Ghetto technique but works every time.

I appreciate it Emilio.

Most diagnostic tools have ABS bleeding procedures. Im referring to the $2-20k ones. I use AutoLogic and a Snap-On modus myself. Or what E said. Only problem is if you don’t trigger all the channels, they won’t activate.

Thanks Curly. I've decided to take it to my mechanic. Brakes are pretty important . . .

What brand of SS lines? Any insight on age?

That must have been a terrifying failure. Glad you are alright.

Not sure. They were on the car when I bought it. I've run the car for about 6 track days prior to last Sun at Barber with no issues. I'm changing them all now!

I was fortunate that I'd wasn't up on someone's bumper when it happened. All in all, a good result from a bad situation.

Yup. We have made that mistake. Which is why we now do it on junk tires. Roll slowly up and down our cul-de-sac lightly dragging brakes to get them warm. Then a burst of speed and full force stab of the brake pedal sufficient to lock all four wheels. Repeat a few times. Pedal usually comes up during that exercise then we do final bleed.

SST or wiring hack is more precise method but not everyone here has those kinds of service tools.

Crack most likely was from over tightening the lines. Flares tend to do that. Unfortunately it’s not something you can use a torque wrench on.

But


https://cimg7.ibsrv.net/gimg/www.mia...59f5696261.jpg

NB ABS has a dance you can do to cycle it (jump a couple wires in the diag connector, hold down brake pedal while turning ignition on or something like that). It's likely the NC does too because as far as I can tell all ABS is made by Bosch, no matter what brand of car it's in. Check the FSM?

--Ian

Please share deets on the handy dances

Note that this is for NB ABS (I think both NB1 and NB2, but I have only used it on an NB2 system), not the NC one referenced originally. See post #53 in my ABS swap thread: https://www.miataturbo.net/build-thr...into-nb-73579/

--Ian

FSM FTW.
We we have them for pretty much every year, did not know it was in there. Thanks!