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94 montero sr no brakes #1102016 09/06/16 08:28 PM
Joined: Sep 2016
Posts: 3
B
Bmpforester Offline OP
Need a Spot
Got a 94 montero sr with no to little to no brakes. I just bought it, the previous owner just said that they stopped working. The abs light had been on for a while. I filled with brake fluid and did get very small amount of braking. I have been all under the vehicle and found no leaks. No leaks around the master cylinder. I did notice what looks to be like a leak from the bottom of the abs modular (on the passenger side front fender well). Can they be rebuilt, common gasket leak? something loose? replace? Throw away no more abs? Any suggestions? Thanks

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Re: 94 montero sr no brakes [Re: Bmpforester] #1102028 09/07/16 09:17 PM
Joined: Sep 2016
Posts: 3
B
Bmpforester Offline OP
Need a Spot
I filled with brake fluid and pumped the brakes for a good bit. I did actually start to feel a little pedal. I got under vehicle and inspected all lines found nothing. It sat for several days in the same place, I went back and inspected again, nothing. Nothing along frame or dripped on floor. Only thing I found was that the fender well was wet under the abs mod. I'm going to try and loosen it with out disconnecting the brake lines so I can see under it. I,m sure it needs to be bleed but it has to be leaking somewhere. Are the abs mod a probable issue or do they never break?

Re: 94 montero sr no brakes [Re: Bmpforester] #1102034 09/07/16 11:50 PM
Joined: Dec 2007
Posts: 2,331
Mudraider Offline
Body Damage is Cool
Never dealt with ABS, I'm more of a Gen 1 guy. But you are talking a 20+ years old vehicle that sat for a bit. Good chance there is an issue with it.

Re: 94 montero sr no brakes [Re: Bmpforester] #1102050 09/11/16 03:51 AM
Joined: Sep 2016
Posts: 3
B
Bmpforester Offline OP
Need a Spot
I took the the abs mod loose. It weeping out the bottom. But I'm not convince that I don't have a booster issue. With the vehicle off I can pump the brakes with no pressure build up.

Re: 94 montero sr no brakes [Re: Bmpforester] #1102124 09/22/16 09:10 PM
Joined: Jul 2009
Posts: 305
B
bodyswapped8789 Offline
Mudrunner
More likely you have bad seals in the master cylinder, fluid is being pushed past the piston in the clyinder. ABS will not likely cause no peddle. Bad Booster will cause hard peddle. Some might say not to do the following but if you need to isolate the master cylinder to see if it is an internal leak. Crimp off the calipers at the rubber brake lines with hose crimps or vise grips with rubber tubes on them to protect the hose (if the hoses are old it may damage them so use discretion) don't have to crimp the hell out of it. Then if the peddle still sinks to the floor with light pressure assuming the system has fluid in it you have bad seals in the master. Abs has valves that move when the wheels slip basically the same as pumping the brakes, it allows fluid to pass freely if it's not actuated this is why you have base brakes with a bad ABS module. If the peddle is hard with the crimps in place you have a leak elsewhere your not finding. Or just rebuild the master for good measure and cross your fingers;) peddle sink with no leaks more times then not the master.


89 V6 manual trans Dodge Raider frame 87 cold weather pkg 2" body lift, Soft 8's wraped in BFG km2 33x10.5x15, JDM Pajero yellow Bosch fogs. Yackama basket. Duel bouncies gen II rear springs,gen II ft brakes,master and booster.
Re: 94 montero sr no brakes [Re: Bmpforester] #1102189 10/03/16 08:41 PM
Joined: Oct 2002
Posts: 1,604
BottomFeeder Offline
Body Damage is Cool
I had no brakes as well. Replaced both the booster and Master Cylinder since they were both 21 years old. I figured I would just take care of all of it since I was in there anyway.



1990 Montero LS "Bottom Feeder" LWB, 33's, Cheapass Lift, 2" body lift, Dual BoUnCyS, Dual LSD's, KC's.
1995 Montero SR Complete LS interior swap and a BoUnCy from a 96 SR. General Grabber AT2's 33X12.5. 1.5" Body Lift
Re: 94 montero sr no brakes [Re: Bmpforester] #1102257 10/13/16 06:01 PM
Joined: Dec 2011
Posts: 33
redraif Offline
Getting the Wheeling Fever
have you checked to see if the calipers are engaging. Had a fiero that sat for a long time and the caliper pistons seized. Bad thing about brake fluid that sits, it absorbs water. Water corrodes the insides of the fieros calipers.

You say you filled with brake fluid, but did you do a true flush???? How did the fluid bleed thru the lines? Even all around?

Also how do the lines feel? I have heard of the rubber lines collaspsing degrading with time. again a GM thing. Why we swapped over to stainless braided lines.

Last edited by redraif; 10/13/16 06:01 PM.

Alpine White 2001 Mitsubishi Montero Sport XLS 3.0L 4WD Automatic
Re: 94 montero sr no brakes [Re: Bmpforester] #1102277 10/16/16 05:25 PM
Joined: May 2000
Posts: 6,132
K
Kevin C Offline
Trail Leader
****
I would start with bleeding the lines. Once you get the air out ( assuming the master cylinder works well enough to allow you to), any leaks should be easier to find.

Missing fluid is often from the back of the master cylinder. Anything else should be easy to spot.


87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...







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