Braking problem - malfunctioning ABS

ChrisSlicks · 04-27-2009, 01:21 PM

Quote:

Originally Posted by import111

If it was fluid, I would imagine that the pedal would not feel firm as you said it did in an earlier post. Sounds to me like the rotors might be messed up some how. Other 370Z's have had pretty deep grooves appear in the front rotors after hard driving. Hasn't happened to me yet, but it might be something to consider. Just trying to get as many ideas out there as I can think of.

I appreciate the brainstorming, it is really odd behavior.

Did some more testing today at lunch as the weather conditions were similar to the weekend, sunny and warm near 80. I mostly used the same roads repeatedly to rule out surface conditions.

The results were that the first few stops were great, like face through the windshield great. I did a couple of laps around the block between each stop to cool things down and even out the heat. After stop 5 things started to go downhill, gradually getting worse each stop. The pedal still feels solid, but something is happening to make the ABS think the surface is loose as you can feel it push back hard on the brake pedal as the fluid is pumped back the other way.

At this point I'm pretty convinced it is somehow heat related, but I'm just not sure how.

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