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front left brake not getting fluid


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bworm
User

Nov 10, 2013, 4:09 PM

Post #1 of 20 (2271 views)
  post locked   front left brake not getting fluid  

Ihave a 99 toyota sienna. Two days ago my wife had to come to a hard stop and the anti lock brakes kicked on. Afterwards she noticed the car pulling to the right when stopping. I drove it and sure enough it was pulling so I replaced both front callipers and new pads. When i went to bleed them the right side went good but the left side has no fluid coming out of it. There must be a stuck valve somewhere. Can anyone help. Thanks.


Hammer Time
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Nov 10, 2013, 4:23 PM

Post #2 of 20 (2261 views)
  post locked   Re: front left brake not getting fluid  

No, you're barking up the wrong tree there................

Replace both front flex hoses.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



bworm
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Nov 10, 2013, 8:13 PM

Post #3 of 20 (2229 views)
  post locked   Re: front left brake not getting fluid  

I will replace the hoses. If that does not fix it any other ideas? Thanks


Hammer Time
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Nov 10, 2013, 8:15 PM

Post #4 of 20 (2226 views)
  post locked   Re: front left brake not getting fluid  

Just change the hoses



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



bworm
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Nov 10, 2013, 8:23 PM

Post #5 of 20 (2224 views)
  post locked   Re: front left brake not getting fluid  

Thanks i will let you now how I make out tomorrow.


bworm
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Nov 12, 2013, 9:52 AM

Post #6 of 20 (2201 views)
  post locked   Re: front left brake not getting fluid  

Finally got the left hose had to order it. Still no fluid. When pumping the brakes the pedal feels very hard and it does not move when I crack the bleeeder on that side. I even pumped the brakes with the hose off and got only about two drops of fluid to come out. I think it has to be something in the abs. Any other suggestions. Thanks.


Hammer Time
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Nov 12, 2013, 10:35 AM

Post #7 of 20 (2190 views)
  post locked   Re: front left brake not getting fluid  

That makes no sense at all. The ABS is "pass through" with valves always closed. Activation of the valve will relieve pressure, not restrict it. Check it over close for any pinched metal brake lines or even a bad master cylinder. The only place i have ever seen this happen is inside the flex hoses.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
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Nov 12, 2013, 11:03 AM

Post #8 of 20 (2184 views)
  post locked   Re: front left brake not getting fluid  

Same with Hammer Time - never even heard of that except the flex hose. Never heard of a defective new one doing the same thing either. Which end did you undo to see if fluid would come out? If at caliper hose is still in question IMO so would try just loosening the hose to metal line connection while pressure applied and see if that will flow.

You'd have to really smash a metal brake line pretty hard to stop flow that bad so IMO either wildly against odd of the new hose or the master cylinder.

BTW - no waste in tossing those flex hoses on a model year '99 anything unless known done already,

T



bworm
User

Nov 12, 2013, 11:38 AM

Post #9 of 20 (2178 views)
  post locked   Re: front left brake not getting fluid  

I tried pumping the brake while I had the flex hose off. Only got a couple of drops out of it. I checked the metal line and there is no damage to it. If it is the master cylinder would it only affect one side? Thanks


bworm
User

Nov 12, 2013, 11:42 AM

Post #10 of 20 (2177 views)
  post locked   Re: front left brake not getting fluid  

Is there anyway to test the master cylinder or do I just have to replace it?


Tom Greenleaf
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Nov 12, 2013, 11:49 AM

Post #11 of 20 (2172 views)
  post locked   Re: front left brake not getting fluid  

How many lines go directly to the master?

I guess you could just crack loose ones to front if two but don't let air back in. It should (famous last words) be the line(s) closest to the booster for front but can't be certain on that.

Gotta go for a while so see what else might be a possible something to cause this from Hammer,

T



bworm
User

Nov 12, 2013, 11:53 AM

Post #12 of 20 (2167 views)
  post locked   Re: front left brake not getting fluid  

What gets me is that it is only to one wheel. Doesnt the master cylinder push to both front wheels or both back wheels.


Hammer Time
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Nov 12, 2013, 12:08 PM

Post #13 of 20 (2166 views)
  post locked   Re: front left brake not getting fluid  

No, you have independent feeds so ABS can control individual wheels. The master sometimes works in pairs but they may be diagonal pairs.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



bworm
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Nov 12, 2013, 1:35 PM

Post #14 of 20 (2160 views)
  post locked   Re: front left brake not getting fluid  

When you say diagonal pairs you mean that the front left would be connected to the back right? If this is so it makes sense because I took it for another drive and it feels like the front is pulling to the right as the back pulls to the left likie I am ridding a wave. I tried to bleed the back right but broke the bleeder, now I have to get it out. After that I will be able to see if it is getting fluid. If not it is the master. Thanks. Ill post how I make out.


Hammer Time
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Nov 12, 2013, 2:04 PM

Post #15 of 20 (2158 views)
  post locked   Re: front left brake not getting fluid  

Yes, many FWDs are set up that way. I don't know for sure that yours is though.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
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Nov 12, 2013, 5:05 PM

Post #16 of 20 (2149 views)
  post locked   Re: front left brake not getting fluid  


Quote
Two days ago my wife had to come to a hard stop and the anti lock brakes kicked on. Afterwards she noticed the car pulling to the right when stopping.



All started during an ABS event. Wonder if there is a problem with the modulator?

Wouldn't surprise me that someone had done some work in the past and pushed the calipers back without opening the bleeder shoving a bunch of garbage into the modulator. The modulator will control certain valves to hold hydraulic pressure in a brake circuit during an ABS event. If the valves got trash in them, it may not release when it comes out of ABS modulation.

Not sure how much bidirectional control you can have with the system using a scan tool, but you may be able to pressure bleed the system while actuating valves in the modulator with the proper scan tool. Maybe it will cause the trash or whatever is hanging it up to get pushed out, if that is the case. If not, then replacing the modulator may be the only answer. Don't think you have a master problem because you get fluid out of the other circuit that is shared with the LF.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Nov 12, 2013, 5:18 PM)


Hammer Time
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Nov 12, 2013, 5:30 PM

Post #17 of 20 (2143 views)
  post locked   Re: front left brake not getting fluid  


Quote
All started during an ABS event. Wonder if there is a problem with the modulator?



That's what he was thinking but I've never seen one do something like that.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Discretesignals
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Nov 12, 2013, 5:34 PM

Post #18 of 20 (2141 views)
  post locked   Re: front left brake not getting fluid  

Me either, but it is just a theory.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Nov 12, 2013, 5:36 PM)


bworm
User

Nov 13, 2013, 9:57 AM

Post #19 of 20 (2126 views)
  post locked   Re: front left brake not getting fluid  

Turns out it was a stuck valve in the modulator. When I took it off I put air to it and the front left valve is not letting anything through. Picked up a used one for $50 from a nearby salvage yard and i am now good to go. Thanks for the help. Problem solved.


Tom Greenleaf
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Nov 13, 2013, 10:22 AM

Post #20 of 20 (2120 views)
  post locked   Re: front left brake not getting fluid  

Glad you isolated it and good to go now. Sorry I couldn't find a dang thing (speak for myself) to be sure of. Didn't post it but became about as certain as could be that it would NOT be the master cylininder on this vehicle if one side did flow. Good luck. Open for now another moderator will likely close it as solved and if wanted just ask it to be unlocked if it isn't working out for some reason,

T







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