ns_redneck

hey guys i need some help. my bosses 2008 f-150 with the 4.6. we just put new calipers rotots and pads on the front. we can't seem to get the air out of the system. my last truck before my 2011 was a 79 and things were easier then. we have been trying for hours and the pedal is still soft and almost goes to the floor. is there a trick to thes truck that i don't know about. the pedal was fine before we did this. any info is appreciated thanx.

SRH

did you pump the brake pedal of couple of times?

ns_redneck

yeah many. we did all 4 wheels. pumped till it was hard then poped the bleeder. but it doesn't seem to get hard enough or even stay that way. but we can't find any leaks at all. and it was all working before we took it apart. we are running out of things to try.

0hsiks_crewcab

You have air in the abs control unit. This will not be removed by manual bleeding. It will need to be taken to the proper brake specialist with the right computer to activate the abs pump while having each bleeder open at once. Then again do an other manual bleed. I changed everything brake related master cylinder, rotors, calipers booster on my 06 nothing did the trick. So while I'm a student at UTI Universal Technical Institute going through ford training they said it may need a abs service bleed. Did that and omg it's an awesome hard responsive brake pedal. Good luck

0hsiks_crewcab

Ooooops didn't realize you said it was fine before then. You might have popped a seal in the master cylinder when you did the bleeding. Following it all the way to the floor can possibly bust a compensator cup seal and thus fluid leaking internally.

wrvond

Start with the brake caliper furthest away from the master cylinder. Then the next furthest, and so on, doing the left front last.

dyeguy1212

iTrader: (1)

Sure it's not the same soft pedal issue majority of these trucks have?

Run a search.

13Harleyfan

Try beeding the master cylinder first, once that feels strong then go thru the calipers, bleeder valves on calipers need to be on the top part of the caliper, on some vehicles they can be install on the wrong side which won't allow you to get the air out. Good Luck!

dereku

Get a vacuum bleeder thats what I use and its much more effective than pumping and bleeding.

Especial86

iTrader: (1)

X2^^^

Make sure the master cylinder cover is off and consistently full of fluid after each bleeding... It's possible that one of your bleeders are damaged, or you have the calipers on the wrong sides... If the bleeders at the bottom of the caliper, then they are on the wrong sides... (IE: the left caliper is on the right side, and the right caliper is on the left side.)