No Power Brakes

[mcdizzle]

Well last weekend I replace the rear brakes calipers, pad and rotors bled it and drove it all week long about 300 miles with no issues. Then last night I jumped in the truck and started it and took off and hit the pedal and nothing pedal went to the floor before I got very little pedal to stop. So I released the pedal and hit it again it was fine then repeated the process nothing hit it again fine, so I parked it. Came home from work today drove it around the block nothing at all this time....... I looked under the truck no leaks of brake fluid, checked the fluid level it was full so what going on? Is it my vacuum pump?

[symbols]

Your brakes are hydraulic assist not vacuum. If the pedal went to the floor then it's either a leak, air in the system, or a bad master cylinder. Since you say you have fluid and no leaks I am going to say master cylinder. If it was a hydraulic problem the pedal would be real hard.

[mcdizzle]

Could it be my Hydroboost? or would i loose power steering also if that were the case?

[symbols]

If your power steering wasn't working which supplies the hydraulic power then you wouldn't have steering and your pedal would be hard. If just your hydroboost was bad just your pedal would be hard.

A brake pedal going to the floor means 1 or more of the following things. You have a leak and/or low on fluid, you have air in the system, or you have a bad master cylinder.

[mcdizzle]

Thanks symbols

[symbols]

No problem. Let us know how it turns out

[mcdizzle]

Well came home from this weekend and figured id try and bleed the brakes...... that wasn't gonna happen. Upon further review I found the hose from the power steering pump to the hydroboost to have a hole worn in it from the shock tower. So what is happening that is causing me to have no brakes? What fluid runs through it? Symbols was right about a leak being one of the three thing that could be wrong. Since I didnt loose brake fluid is it power steering in that line?

[mcdizzle]

im still wondering why i have power steering and no brakes if its a power steering line....... wouldnt i loose both?

[symbols]

I don't see how you have power steering. I would think the pump would drain itself pretty quick with a hole in the line unless it's tiny.

[mcdizzle]

could the hydroboost lock itself if air got in it?