Pull to the left under hard braking
I can't figure this shit out.
I just put on new rotors and pads on the front. I bed them in etc. etc. Under hard braking I get a pull to the left. After some inspection, its fairly obvious that the LF is working harder than the RF. The wear pattern on the LF rotor is pretty well established, the RF rotor still has some machining marks on it. I change the caliper on the RF with one I had laying around. Same shit. I bleed the system. 3 times. I'm about to swap the rotors and pads from side to side and see what happens. Could this have anything to do with the MC? Any ideas? Shits bugging the hell out of me. |
The only thing i can think that would do that is siezed slider bolts...did you clean and lube them?
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Yep, multiple times.
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Hmmm, im thinking a bad caliper. The one you threw in was it new? Cause if your bleeding them and your getting fluid through the caliper its not the master, if it was the master your pedal would go to the floor.
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I suspect cheesy master. On Miatas, proportioning valve only deals with rear lines (if my memory is good for anything).
You're getting different flow (volume) to LF than RF. Change master, and tell us. |
Thats what I was thinking, is the split a diagonal split? As in if my RF isn't getting sufficient pressure, my LR probably isn't either?
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And it was working perfectly before? How are the brake lines, check them then look at the calipers.
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It seems to have slowly gotten worse, replaced the front lines with steel lines, no leaks.
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Don't think so.
I've been playing so much with my Galant VR-4, that my memory is fuzzy. Besides, with Miata in the garage, there's nothing to look at. But, going by manual, the master supplies fluid to LF, RF, and rear. Rear is fed through prop valve. I think the pressure is split only front/rear. Check your rotors in the rear. And, swap the master. |
Isn't the Miatas system wayyy biased towards the front anyway? My rears took forever to get a wear pattern on them last time I changed the rotors.
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Yep.
But, your problem isn't that the rear isn't locking. If that, then I'd look at prop valve. The problem is uneven pressure distribution. Faulty master (I'm guessing). Start by replacing it, and not spending time on Internet forums. :D |
Have you checked your tires? I had a newer tire on the front right of my integra and it would pull slightly to the right while driving.
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He says it's only under hard braking.
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are the bleeders tight? I chased this issue on my wilwoods, only 10-failure points between the pair!!!
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Yep, bleeders are tight. Just swapped back to the old caliper that isn't painted VTEC Red. Swapped pads and rotors side to side. Gonna see what happens. MC is on order.
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I had the same problem. It was the OE bushings coming apart on the bottom front control arms at the camber bolts. It was pulling right and about half of one the bushings had come out, so I was get some big toe out under heavy front load. No fun on a roval.
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http://farm4.static.flickr.com/3138/...3c319711ee.jpg
does it have brakes like this? ... sorry. i had to. |
Those are top quality race brakes right there.
So I switched pads/rotors from side to side. Now I have a pull to the right. The rotor with not much of a wear pattern on it has a strange yellow hue towards the center. Wtf? |
It's your tire pressures.
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I would machine the rotors and try some dofferent pads. Also check measure the rotor thickness to confirm that onw rotor is not way thicker than the otheri
What is the wear on the left side like now? Is it starting to wear a little better? One might be beded a little better than the other. Drive it for a but to see if the left will come in. What kind of pads are you running? Report back after a little more driving. Have a great day, Jared |
I've been braking hard a lot trying to bed them in, its been a few days now and nothing...I'm going to switch just the pads from side to side tomorrow and see what happens. I have a feeling the yellow hue on the rotor isn't normal...
The rotors are OEMs from 949 and hawk HP+ |
Originally Posted by MartinezA92
(Post 568090)
I've been braking hard a lot trying to bed them in, its been a few days now and nothing...I'm going to switch just the pads from side to side tomorrow and see what happens. I have a feeling the yellow hue on the rotor isn't normal...
The rotors are OEMs from 949 and hawk HP+ |
Originally Posted by hustler
(Post 568095)
The gold color is just some heat.
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It has to be siezed lol, its getting hot because its always braking and its pulling because its always braking. All i can say is something is fucked :)
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Originally Posted by stranges12712
(Post 568135)
It has to be siezed lol, its getting hot because its always braking and its pulling because its always braking. All i can say is something is fucked :)
My problem is that its NOT braking. |
Originally Posted by MartinezA92
(Post 568136)
Lolwut?
My problem is that its NOT braking. |
Everything is installed correctly, I have a firm pedal. I've eliminated any of the calipers. It has to be something with the pad/rotor.
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Originally Posted by stranges12712
(Post 568140)
IYou put all the clips and sliders in,
Are the slider pins lubed?????? |
Originally Posted by alik
(Post 568326)
Yes, yes, yes.
Are the slider pins lubed?????? |
Pardon me.
I happen to be a little busy at the moment. You see, I'm somewhat pre-occupied. You know, extracting my foot from my mouth and what not. Cheerio! |
You're sure it's a brake problem?
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Originally Posted by alik
(Post 568367)
Pardon me.
I happen to be a little busy at the moment. You see, I'm somewhat pre-occupied. You know, extracting my foot from my mouth and what not. Cheerio! |
Originally Posted by m2cupcar
(Post 568380)
You're sure it's a brake problem?
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The problem followed the pads... :vash:
Just ordered another set, done dealing with this shit. |
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