Car pulls to the right under braking?

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Leavell119
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Car: 94 Z32 Fairlady

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Its been doing it since I purchased it a couple months ago. I installed new pads and rotors last night with very little difference in the pulll. It may be slightly better but i still feel a pull to the right side when u apply the brakes medium to hard. Any ideas for me?


Re037
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Car: 1992 300zx 2+2 NA

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check alignment? also, maybe your calipers need to be rebuilt. the pistons might not move as freely after 20+ years

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evildky
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Could be a number of issues, the aforementioned callipers and alignment, also tie rod ends and ball joint/

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Ace2cool
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My money is on a caliper rebuild or warped rotor. Could be something more serious, like suspension as well, though.

Leavell119
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Rotors and pads are new. But all the suspension parts are old and soo are the calipers.. Thinking I should wait to judge until after the suspension is all done, then possibly rebuild calibers?

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Ace2cool
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Could be a dangerous situation, though. I'd give it a good inspection.

ThisIsSparTTa
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It's not alignment if it only pulls under braking. Your calipers aren't depressing evenly. I'd replace/rebuild calipers (you can get a kit to rebuild, and its not hard). I'd also consider replacing the rubber brake lines, and if you're going to do that, you might as well go Stainless Steel. A brake fluid flush before all that wouldn't hurt either, if it didn't get done with the pads. You could have air in that one caliper.

Leavell119
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Brake lines were already stainless, flushed and bleed with the pads, but did not rebuild. Im thinking with the suspension, thats the next try?

ThisIsSparTTa
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Suspension/alignment will not cause you pull only under braking unless like...something is just broken/disconnected and its allowing the whole assembly to move about, but I think you'd feel that other situations. My bet would then be on your caliper. If it pulls to the left, that means the drivers side is doing more work, and your passenger side is your likely culprit, and vice versa.

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Ace2cool
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ThisIsSparTTa wrote:Suspension/alignment will not cause you pull only under braking unless like...something is just broken/disconnected and its allowing the whole assembly to move about, but I think you'd feel that other situations. My bet would then be on your caliper. If it pulls to the left, that means the drivers side is doing more work, and your passenger side is your likely culprit, and vice versa.
Solid advice. The broken/disconnected was kinda where I was going with my dangerous situation comment. My TT used to pull to the right when I was off the throttle, and left when I gunned it. It was rusted pistons. Luckily they were still good enough to buff the rust out and get by with new seals (A good thing, because there were only 9 pistons left in the world and at $50ish a pop, that's too much, and it takes 12 anyways). But my right rear was completely frozen and took a lot of force to get free.

nissanfreak12
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ThisIsSparTTa wrote:Suspension/alignment will not cause you pull only under braking unless like...something is just broken/disconnected and its allowing the whole assembly to move about, but I think you'd feel that other situations. My bet would then be on your caliper. If it pulls to the left, that means the drivers side is doing more work, and your passenger side is your likely culprit, and vice versa.

I will have to agree to disagree, if he is still using the OEM tension rods, one of the bushings could be bad. If the bushing is good enough for normal driving, you will not feel it until you brake, which puts XX amounts of force on the failing bushing causing it to pull to one side. HAd this happen to me, then went to SPL adjustable. Now Im on to a different issue.

Like stated earlier, check and recheck everything. If you feel everything is good, have someone else check it out until something is found.

Leavell119
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Ok guys I finally got to rebuild the right caliper... I've got the same issue.. Pulls right under braking and when u release the brakes, it hangs up a bit... Any more ideas??

ThisIsSparTTa
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You rebuilt the right side and it pulls to the right? You did the wrong side. Also, might as well have done both anyways.

If your LEFT caliper was not depressing properly, it would cause your left wheel to spin faster than the right wheel, causing the car to turn to the right.

Also, after all of this, you should bleed all 4 brakes + 2 ABS points.

Leavell119
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I didn't say it in the post but I had rebuilt the left at the same time... Where are the 2 abs points? Ill try google

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Ace2cool
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In the cabin, on the ABS module. They were removed in (I think) 94. May have been 93. Yours being a 94, won't have them. Don't bother looking. The module is *supposed* to self-bleed, but we all know better than that. Best you can do is bleed 4x as much as you normally would, because there's 4x the amount of line as there would be in some cases.

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Ace2cool
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I still think something is broken or loose though, FWIW. Also, is your car a TT? Having that in your profile would help. HICAS could also be giving you issues. That turned out to be the other half of my problem.

Leavell119
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Car: 94 Z32 Fairlady

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Yeah Im sorry I didnt have that filled out. Its just an NA.. No Hicas.. Im about to rebuild the rears tonight justttt to be sure their not acting up.. But please.. Correct me if Im wrong but When Bleeding,, The front right wheel seems to be the longest line(first one to bleed) as it goes all the way to the back pass side and then runs back down the frame rail to the front right wheel area.. Am I correct there?

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Ace2cool
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I would say the front left wheel, as it goes back and then right back up where it came from, essentially. But either way, the fronts are technically a longer stretch.

ThisIsSparTTa
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Bleed order is LR,RR,LF,RF, then ABS (when applicable).

And yea, the rears would be good to do too, but if its still messed up, then I guess it would have to be something like tension rod or something literally broken/disconnected.

Leavell119
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Car: 94 Z32 Fairlady

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All brakes have been rebuilt.. car no longer is losing fluid.. Car still pulls to the right.. are there porportioning valves in these cars? Or do the master cyclinders go frequently?

ThisIsSparTTa
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It's a fixed proportioning valve, and its for front/rear, not left/right. Master cylinders can fail, but again, they have outputs for front/rear, not left/right. You could have a blocked brake line somewhere, etc too. I'd double check for loose suspension parts at this point.


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