Need expert advice with my 5 Lug Convo.

[5LugFoxFanatic]

Brake Expert Advice please.

I did a 5 lug convo on my 86 using SN95 parts. I used a 85 Lincoln Towcar MC and gutted the Pro. Por Valve like Matt's website says. I also installed a knob style Adj. Pro. Por. valve. The problem is, I have a mushy brake pedal. I blead the lines and they are free of air. When I step onto the brakes it feels mushy then they kick in when I push about halfway, then they stop like no ones biz. If I immediately push the pedal again, it seems like I have normal brakes. So I have to pump the pedal to get a nice firm pedal when I am driving. So I would like to know how I can get the pedal to be normal all of the time. I twisted the knob a few times and that seemed to help, but did not rememdy the situation. I thought about maybe adjusting the brake booster out a bit if that might be the problem. Thanks!

 

[5LugFoxFanatic]

ttt

 

[BlackFox5.0]

What are you using for rear brakes? And make sure you opened the prop valve all the way (turned all the way out) when you bleed the rear brakes, and get out the air from when you put in the prop valve....

 

[Matt90GT]

You have air in the system!

Like asked, what rear brakes are you using?

 

[5LugFoxFanatic]

I am using the rear disc brakes form a 94-04 stang. Yes, you guys were right, I blead them tonight for the third time, an assload of air came out of the front passenger side. And all I can say is holy crap. Nice firm pedal and man do they stop. I was going to buy the 13 inch cobra fronts, but now with 99 dual pot pbr's, this should be better than 10 inch rotors and drums.

Kinda scarry though. I was on the freeway, and I stepped on the brakes and they went to the floor and nothing happened unless I pumped it 4-5 times. Thank goodness this is fixed. I was starting to get pissed and started to regret my decision of dumping in a boatload of dough for the brakes and wheels and tires.