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Ford MustangThe Mustang remains one of the most widely recognized, respected, and desired nameplates in the automobile business. The Ford Mustang defined the pony-car segment in 1964; Plymouth's Barracuda may have beaten Ford to the showroom by 16 days, but it was the Mustang that set the sales records. The 'Cuda is gone now leaving Ford's pony to prance alone.
Having some serious pedal fade in my one owner rust pile on wheels (85 LX coupe, 302 5 speed).
During the recent cold weather I had no pedal sometimes, decent pedal at others. Heard a lot of air coming out from near the brake pedal's location and figured there is a vent located in that area.
But here is my question: How does the power boster develop "power"? I can find no vaccum hose or fittings running between the engine and the boster housing. (The shop manuals do indicate the 4 and 6 cylinder cars had a line between the block and boster but not the 8).
I'd like to figure this out before taking the time to change the master cylinder.
See if you still have the fade with the engine off. Pump up the brakes and see if the pedal stays hard or goes to the floor, if it goes to the floor you have a bad Mastercylinder.
There should be a fat vacuum hose that goes to the Power Booster.
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Mark V
1998 Explorer 4.0 SOHC
1998 Windstar GL 3.8
2001 Corvette Coupe 6 Speed
2006 Honda Shadow Spirit 750 http://public.fotki.com/snextime/
No funny signatures today, thinking of some better quotes so people dont think they are directed to them when I post.
Figured that but wanted a second opinion. And, yes, there SHOULD be a vacuum hose but this car doesn't have a place to attach one when seen (and felt with hands) through the hood opening. Maybe it is routed through the firewall and attaches inside the car?
New fangle cars, give me a 1960's Falcon to work on anyday, LOL!
Get ready for the 351 boss build this summer, 4v closed chamber heads, 2.25/1.75 valves, .750 lift, 12.5:1 piistons, wieand tunnel ram, nitrous, I think its gonna roar!
Chalk it up to old age and not seeing what I thought I should see vs what is there.
Yep, right there on the front of the boster is a 90 degree fitting with a thick hose that runs along the firewall to a vacuum manifold. I wanted to see a thick hose coming off the side of the boster and running directly to the top of the engine.
I've decided "it is time" and have signed up for a 23 year old "seeing eye" redhead. (Come to think of it if I had done that earlier I'd have kids by now that could work on the car for me. LOL!)
Get ready for the 351 boss build this summer, 4v closed chamber heads, 2.25/1.75 valves, .750 lift, 12.5:1 piistons, wieand tunnel ram, nitrous, I think its gonna roar!
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85 LX power brakes booster 
Linear Mode
