The Wildchild

iTrader: (1)

Ok so I changed all my brake pads on my 88 GXL with 4 piston calipers and rear pads also, I also flushed my brake fluid till clear fluid was flushed through. But now I cant get the brakes to pump up and stay pumped they just loose pressure after a second or two, I bled them in RR, RL, FR, FL and checked all fittings for leaks and bleeder valves. The only thing that concerned me was a torn caliper boot on the RL caliper. I also used the correct tool to compress my brakes if that matters. And yes I recruited someone to operate the pedal for me. I even had a guy at auto zone tell me to bleed a line into a cup of fluid untill there was no fluid in the hose attatched to the bleeder valve and keep the bleeder valve open and rapidly pump the fluid then tighen in while they are pumping on all four calipers still nothing.

THE_FATTIE

The guy at autozone told you to rapidly pump the breaks with a bleeder open? All thats going to do is get you an air pocket... But if your sure you dont have an air pocket check the master cylinder... if its full and the cap is on tight then Id say some how SAFELY get the car to flat clean concrete and pump the $h1z out of the petals for a while... If there is a leak you will be able to find it by the big wet spot when you move the car

The Wildchild

iTrader: (1)

No the guy at auto zone told me to put a clear hose onto the bleeder valve and stick the other end of the hose into a cup of brake fluid and bleed like normal until the hose was full of fluid and had no air in it then open the valve and pump rapidly, and yea im almost 100% sure there is no leak anywhere I used 3 cans of break fluid cleaning everything off and pumped for about 3 min and everything was still super clean and dry, so i dunno and i have no leaks on the MC eaither. I also just checked the vacuum hose but nothing.

clokker

iTrader: (2)

Assuming you haven't overlooked a leak somewhere, about the only place left to look is at the master cylinder itself.
Get your helper back in the car and have him put pressure on the pedal.
Use your line wrench to quickly crack/retighten each fitting on the MC - you'll want a rag underneath to catch any fluid. This is essentially a quick and dirty way of bench bleeding the MC in place.

If that doesn't fix you up, I'd guess the master cylinder is bad.

The Shaolin

iTrader: (5)

Three words.

Motive power bleeder.

Works AWESOME.

As stated, you either have a leak somewhere or something else is bad.

The brakes were fine before? All you changed were 4 pads and two calipers?

daviddeep

iTrader: (4)

I second the recommendation for the Motive Products Pressure Bleeder. Eliminates the need for an assistant when one is not readily available. I did have some trouble with their supposed exact-fit adapters, but their technical support people gave me a universal adapter for free. Here's a thread on this subject, if you're interested:

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/question-anyone-who-uses-motive-products-pressure-bleeder-851939/

funkjaw

iTrader: (3)

Actually that is another way of bleeding the brakes. Just crack a a bleeder open on the caliper, and pump until you don't see any more air. Its faster BUT it uses a lot more brake fluid, you have to make sure the master cylinder doesn't run dry on brake fluid while doing it.

clokker

iTrader: (2)

Another option for solo bleeding is "speedbleeders" which replace the bleed screws with ones with check valves. They work very well.
Having done a boatlaod of brake bleeding lately, I finally wised up and just got a 12' length of tubing which I connect to the speedbleeder on the caliper and then run back into the master cylinder reservoir.
This is only a good idea if you know all your lines are clean an you're pumping good brake fluid.

The Wildchild

iTrader: (1)

thanks guys I got them working like new, i just had to break loose the fittings on the MC and it bled alot of air our and then i re bled my breaks and bingo. Thanks Again!