Impossible, it seems like my car will never go straight... Help! Please :(..

[Sside]

Alright guys.... Upon talks with some friends I decided to pull the abs fuse so that the car would go into the back up non abs braking system. And after months of this horrible pull I finally got to drive my supra and go straight when braking. So for now there is no problem, but I dont want to just drive around like this. I still need to fix it. The good thing now is I have finally pin pointed the problem. This is either going to be my actual abs, or indeed we have found out today that the rear speed sensor can cause this. I will first try and find a rear speed sensor that eliminates the code and see what happens. If not then, abs it is...... Next couple of days will be interesting once I get my abs back... ... I can move on to fun stuff now, like lowering springs on my car .....

 

[Poodles]

Alright guys.... Upon talks with some friends I decided to pull the abs fuse so that the car would go into the back up non abs braking system. And after months of this horrible pull I finally got to drive my supra and go straight when braking. So for now there is no problem, but I dont want to just drive around like this. I still need to fix it. The good thing now is I have finally pin pointed the problem. This is either going to be my actual abs, or indeed we have found out today that the rear speed sensor can cause this. I will first try and find a rear speed sensor that eliminates the code and see what happens. If not then, abs it is...... Next couple of days will be interesting once I get my abs back... ... I can move on to fun stuff now, like lowering springs on my car .....

A defective ABS sensor can't cause that symptom.

Pay attention to him, he knows this car better than probably anyone on the forums...

 

[Sside]

Pay attention to him, he knows this car better than probably anyone on the forums...

I dont need smart a$$ remarks from you dude... The reason I am still posting is so that future members can benefit if they encounter such problem.

Maybe you should have read the other part where the abs was deactivated and guess what..... No pull. I am looking at a faulty abs that was replaced once already/ code 33 rear speed sensor/ wiring/ abs computer. One of these or all may be causing this problem, and I guess that I will find out pretty soon if a faulty rear speed sensor can or cant cause this issue because I have to replace it anyways due to the code I am getting.

If you want to contribute in the future, contribute. Instead of jumping at the first chance you get to try and make someone look stupid.


As to JetJock, I appriciate your input and trying to give me a hint on how to resolve my issue. I respect you and your experience with these cars. Thats why I made a thread about it. Because I needed help from someone who actually knows more than I do.

 

[jetjock]

Well, you are getting help from someone who knows more than you but it's not me :icon_razz

Myself, I think you should put the abs fuse back in and see what happens...

 

[Poodles]

I dont need smart a$$ remarks from you dude... The reason I am still posting is so that future members can benefit if they encounter such problem.

Maybe you should have read the other part where the abs was deactivated and guess what..... No pull. I am looking at a faulty abs that was replaced once already/ code 33 rear speed sensor/ wiring/ abs computer. One of these or all may be causing this problem, and I guess that I will find out pretty soon if a faulty rear speed sensor can or cant cause this issue because I have to replace it anyways due to the code I am getting.

If you want to contribute in the future, contribute. Instead of jumping at the first chance you get to try and make someone look stupid.


As to JetJock, I appriciate your input and trying to give me a hint on how to resolve my issue. I respect you and your experience with these cars. Thats why I made a thread about it. Because I needed help from someone who actually knows more than I do.

One, it wasn't a smart ass remark.

Two, I always read posts I reply to. Yes, you might have an ABS issue, but a rear speed sensor is not going to cause the car to pull in a direction since the system is only 3 channels.

Three, I don't make people look stupid, they do it well enough on their own.

 

[Sside]

I rather not put the abs fuse back in before I actually replace the speed sensor. I would like to first eliminate code 33 on the abs. Perhaps the sensor/code is not causing my pull. But its still there, and its something that needs to be fixed. Once the code is gone I will move on to replacing the abs once more and or the computer. But first I will check my wiring from the speed sensor. Once the code is gone I can move on to what actually went bad here. For now, I will drive the least I can and try to have the car ready for the next semester of school.

Oh and poofles
"Three, I don't make people look stupid, they do it well enough on their own." -Poofles
x2.....
Thanks anyways thou.... I appriciate you.


I will keep this thread updated untill problem is resolved.

 

[jetjock]

I agree the code should be fixed but it's not related to your problem. In fact I seriously doubt your problem is ABS related at all. It's certainly not electrically related. It's your car, money, and time though. If you're convinced this is the right approach you gotta do what you gotta do.

 

[Sside]

I agree the code should be fixed but it's not related to your problem. In fact I seriously doubt your problem is ABS related at all. It's certainly not electrically related. It's your car, money, and time though. If you're convinced this is the right approach you gotta do what you gotta do.

I had a buddy of mine look at it five months ago when I was working for a shop. He is a mercedes master tech, and almost assured me it was abs related. I honestly blew him off because I didnt think it could be my abs. After trial and error and more error of replacing just about everything that could cause this pull. I started giving in to the abs theory. And started reasearching more on the abs. Pulled the abs fuse and and the pull was gone. Doesent this clearly point towards the abs? Or did my car magically fix itself once the abs circuit was cut(not trying to be sarcastic).... The car only pulls when braking at higher speeds. But this is an aggresive and dangerous pull left then right.

Could you explain a little more in depth why you feel like this has nothing to do with the abs. I think this is great for future reference for anyone whom encounters such an odd pull.

 

[mk3_7m]

I had a buddy of mine look at it five months ago when I was working for a shop. He is a mercedes master tech, and almost assured me it was abs related. I honestly blew him off because I didnt think it could be my abs. After trial and error and more error of replacing just about everything that could cause this pull. I started giving in to the abs theory. And started reasearching more on the abs. Pulled the abs fuse and and the pull was gone. Doesent this clearly point towards the abs? Or did my car magically fix itself once the abs circuit was cut(not trying to be sarcastic).... The car only pulls when braking at higher speeds. But this is an aggresive and dangerous pull left then right.

Could you explain a little more in depth why you feel like this has nothing to do with the abs. I think this is great for future reference for anyone whom encounters such an odd pull.

In b4 something happens.

 

[Raven97990]

Jet is not saying it could not be the ABS module- but it is in no way related to a bad rear speed sensor.

MK III ABS is 3 channel, which means it can control left front, right front and both rears together. Meaning if the right front locks up, it will modulate right front pressure, if the right rear locks up- it modulates BOTH rear brakes as it does not differentiate left or right.

The ABS computers default logic when a trouble code is set is to return to "neutral" or bypass- meaning there will be no brake modulation under any condition.

The fact that you removed the fuse may be coincidence, or there is a tiny chance that both ABS units are bad, or you have debris in the brake lines.

 

[Typhoon]

ABS systems, all of the ones I have ever worked on, shut down if there is a sensor or power supply/earth problem and revert to normal braking systems. The only way an ABS system will cause braking pull is if one of the valves in the ABS pump physically jams, and then you'd have other symptoms as well.
I am amazed the amount of time and money you've wasted chasing this problem when it's something stupidly simple like a sticking caliper or a blocked brake line.
I love internet forums... "I have this problem. Even though people with far, far more knowledge than I have about the problem suggest something, I will keep on posting until someone tells me exactly what I want to hear, not how to fix the problem".

 

[Raven97990]

Also on my old MK II it had a worn upper shock mount on the left front- at high speeds (100+mph) it would shake violently, and then under braking it would pull hard right. The cause was the upper suspension mount would move forward changing my caster and caused a caster pull right.

The fact the pull started around when you worked on your suspension makes it less likely ABS related. Something you did in replacing the shocks caused this. Are you sure the springs are properly seated? Did you load the suspension when you retorqued everything?

 

[shipkiller]

Might worth to check but my steering rack holder's bolts werent tight enough and the steering rack would shift left and right about 3 inch. Kind of obvious but who knows

 

[jetjock]

I'm afraid further research shows there's a slight possibility he may be right. From a technical standpoint I still don't see how it could happen but we'll just have to wait and see. I sure hope Toyota wasn't that stupid. Not a fan of crow either...

 

[Raven97990]

I'm afraid further research shows there's a slight possibility he may be right. From a technical standpoint I still don't see how it could happen but we'll just have to wait and see. I sure hope Toyota wasn't that stupid. Not a fan of crow either...

Mind sharing what you found? Unless my understanding of Toyota's 3 channel ABS is off- it's not possible. Unless the rear speed sensor occasionally self clears the light and then creates a phantom signal that is erratic and causes the ABS to function of bad information.

 

[jetjock]

Never mind. Figured it out. I'm back to thinking he's barkin' up the wrong tree...

 

[Sside]

ABS systems, all of the ones I have ever worked on, shut down if there is a sensor or power supply/earth problem and revert to normal braking systems. The only way an ABS system will cause braking pull is if one of the valves in the ABS pump physically jams, and then you'd have other symptoms as well.
I am amazed the amount of time and money you've wasted chasing this problem when it's something stupidly simple like a sticking caliper or a blocked brake line.I love internet forums... "I have this problem. Even though people with far, far more knowledge than I have about the problem suggest something, I will keep on posting until someone tells me exactly what I want to hear, not how to fix the problem".

I replaced the calipers and the lines with new ones and the problem was still there..... No amount of money or time has been wasted here pal, its a 20+ yr old car and everything I have replaced was for the improvement of an aging car I use everyday. I replaced parts I needed to replace anyways because I like to take care of things before they cause bigger damage. I am not begging for answers here, I am trying to document this problem so the forum actually benefits from it despite who is wrong or right. I am not looking for what I want to hear, if that was the case I would have never made this thread. I am looking for opinions. Opinions only.

 

[Sside]

Never mind. Figured it out. I'm back to thinking he's barkin' up the wrong tree...

Okay, my only reason for thinking the sensor could cause this pull was the code I got from the abs computer. It was interesting to me that maybe a sensor could cause this pull so I reopened the thread to see what the supramania community would say and for the benefit of the forum. This has turned into an I am right you are wrong thing and thats not the point. The point was to together figure something out that is not as typical as a sticking caliper. Looks like its not the sensor causing the pull, I am wrong. I have not replaced it but a little research there shows I am wrong. Next step is to replace all my lines going from the master cylinder to the abs. Once this is done I will put the fuse back and see what happens. If I still pull then the only suspect is the abs.

I am not looking to prove anyone wrong or prove myself right. Everyone learns at one point. This "simple problem" has honestly stumped me. Considering all the problems I have had with this car all but this one I have been able to fix. Because everything from a bhg to an engine rebuild is less complicated than a brake pull. I believe I am close to the fixing this, its not even a worry anymore. But still I hope to end this thread with a RESOLVED. So that a future sside can either look at his abs or make sure his lines are not causing the pull. With thanks to all those who helped (Jetjock and many others) and those who didnt.

 

[jetjock]

Well, regardless of what it turns out to be it's damn difficult to argue with the logic, rationality, and composition of those last two posts. Well done.

 

[D.J.T.]

Are all your suspension pieces there? I had a 90 Celica GT that was missing the suspension piece that goes from control arm to control arm (Idk the name of the part... & bought the car like that so i didn't know). lasted a long time. aligned many times but It would still pull to one side. Then chassis started opening up & the axle kept busting out (I went through 5 Axles including the original before i found the problem). Did some homework on the chassis. went to junk yard, bought piece, installed, problem solved, sold car. Just sharing a little piece of my experience with you.