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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

no brake pressure after sitting for awhile

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Old Oct 19, 2013 | 11:45 AM
  #1  
jenandjasonm's Avatar
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no brake pressure after sitting for awhile

My truck brakes work great after driving for awhile but if it sits over night the next day my brakes suck the first few times being used. Anyone know whats going on? I have a 1990 4cyl auto trans 4x4 with working a/c, no lift and only running 235/75-15 at's

no brake pressure after sitting for awhile-forumrunner_20131019_144400.png
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Old Oct 19, 2013 | 12:03 PM
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HighLux's Avatar
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From: Ofallon Missouri
Check all the vacuum lines to the booster.
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Old Oct 19, 2013 | 12:04 PM
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scope103's Avatar
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From: San Francisco East Bay
Sounds like a leak in the brake booster system. http://personal.utulsa.edu/~nathan-b.../2troubles.pdf
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Old Oct 19, 2013 | 04:37 PM
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Ok thanks ill check it out tomorrow
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Old Oct 20, 2013 | 02:42 AM
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From: I live in New Tripoli Pa out in the woods
Red face

Just what do you mean by "My Brakes Suck"??

pedal goes almost to the floor??

Losing any brake fluid?

The pedal is very hard to push??

one or more brakes grab till the gear oil or grease is burnt off??

All lead to quite different issues.
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Old Oct 20, 2013 | 06:15 AM
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I have never lost any fluid. All brakes are grabbing. Very easy to press but feels like no pressure the first 3 or 4 times pressing the pedal. Brakes squeak the first 3 or 4 times but after that they work great. I could drive it all day and there great after that.
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