OK so here is the situation, the truck has bad brakes. Bad brakes explained being, normal braking it is ok with, but in the mornings (or when i need to stop fast anytime of day) when i first drive or when the truck has been sitting a while the brakes don't seem to engage fully, I can put both feet on the pedal and push as hard as i can and the truck will come to a gradual stop. when the truck is warmed up they work much better but not as good as they should. (and im comparing them to previous rangers that I have owned) i cant even get them to lock up on purpose on loose grave. I have bled the lines 3 times and installed new pads. The previous owner had a new master cylinder and a break booster installed before he sold it to me. I took it in to big o tires and they ran a diagnostic and cam back empty handed.

I'm out of ideas! Help?

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<02 Ranger Edge> 3.0L v6 <programmable superchip <300 amp alternator> 4" supper lift suspension kit <33s> warn vr10000 Winch <Skid Plate> 4WD

first i would do is park the truck

next thing..the pedal is it stiff or really mushy/goes right to the floor?

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2021 F150 5.0 Screw

Past:18 F150 2.7, 16 F150 5.0, 14 F150 5.0, 07 F150 5.4, 03 Ranger 4.0

Master Certified Ford Parts / Warranty Admin

I'd say that the pedal travels more then it should but it inst spongy or squishy. As much as id like to park it its my daily driver and im working full time along with school full time, I drive with 15 car lengths in front of me and i'm diffidently not driving it like a hot rod.

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<02 Ranger Edge> 3.0L v6 <programmable superchip <300 amp alternator> 4" supper lift suspension kit <33s> warn vr10000 Winch <Skid Plate> 4WD

Also I have checked the rear brakes and they are working and are adjusted properly, with almost new pads, im looking at the front because that's where 70% of the braking is.

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<02 Ranger Edge> 3.0L v6 <programmable superchip <300 amp alternator> 4" supper lift suspension kit <33s> warn vr10000 Winch <Skid Plate> 4WD

It sounds like your brake booster is not working. Check the vacuum hose to see if your getting vacuum.

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barneycat11 2006 FX4

I agree that it is a the booster vacuum that is not working. Best be very careful till you get this fixed because you can have catastrophic failure at any time.

ok so in talking to some grease heads about the brake problem, tthey said that i need to upgrade the master cylendar. i was wondering if yall have done a upgrade, i was told that a f250 is a bolt for bolt swap.

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<02 Ranger Edge> 3.0L v6 <programmable superchip <300 amp alternator> 4" supper lift suspension kit <33s> warn vr10000 Winch <Skid Plate> 4WD

If you have all those parts you listed as new I'd say look at either your calipers and brake pads and even the pedal itself. Make sure the brake pedal arm is not bent or not beginning to engage the brake booster immediately after depressing it. It could be that the arm is bent or the brake booster piston is recessed and you are limited to only applying the brakes half way and not to its full potential. This is similar to the throttle body mod, where the wire gets stretched and therefore you can't open the throttle fully when the pedal is to the floor.

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Ford ranger 2001 edge, 3.0 vulcan, manual transmission, 3.73 open diff., 29" tires, 1.8 ratio Harland Sharp roller rockers, fender pod filter intake, MSD ignition wires, thrush glasspack, last catalytic comb delete, Electric fan, Nitrous Express wet kit 50 shot atm (soon to be supercharged, eaton m90, custom designed supercharger adapter intake by me )