Hard pedal, spongey brakes? - Ford Powerstroke Diesel Forum

 
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post #1 of 9 Old 03-04-2014, 03:32 AM Thread Starter
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Hard pedal, spongey brakes?

Hey all.

My 99 is having some weird brake issues.

When driving, to stop, I have to apply pressure to the brakes, then back off and go again before they come on. I have replaced the pedal switch but its still there. It takes a second or two before it seems to realize im push the pedal. If you just jam it, its really hard but the brakes are really soft.

Any ideas?

~ The Maddawg



1999 F250 Lariat 4X4 Offroad
Under the hood: 7.3 diesel, 4in straight piped to 6in shotgun dual stacks, DIY 6637, Bigg Boost. Foil delete. Riffraff FRx. IH Bellowed Up Pipes. Wicked Wheel Gen 1. TS Chip with canned tunes *Wrecked 5/16


1999 F250 XLT ECSB 2wd Auto. Hydra chip, gauges, 6637, Army OD Green on stock rims...
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post #2 of 9 Old 03-04-2014, 03:45 AM
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Booster? If you mash the pedal in park do you hear the booster working? Is your hydroboost original?


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post #3 of 9 Old 03-04-2014, 03:47 AM Thread Starter
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Both very good questions. I'll check when I go out. I dont think it does. And I got the truck 2 years ago so I'm not sure if it's original.

~ The Maddawg



1999 F250 Lariat 4X4 Offroad
Under the hood: 7.3 diesel, 4in straight piped to 6in shotgun dual stacks, DIY 6637, Bigg Boost. Foil delete. Riffraff FRx. IH Bellowed Up Pipes. Wicked Wheel Gen 1. TS Chip with canned tunes *Wrecked 5/16


1999 F250 XLT ECSB 2wd Auto. Hydra chip, gauges, 6637, Army OD Green on stock rims...
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post #4 of 9 Old 03-04-2014, 07:07 AM Thread Starter
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There is a bit of PS pump whine when I put my foot on it in Park

~ The Maddawg



1999 F250 Lariat 4X4 Offroad
Under the hood: 7.3 diesel, 4in straight piped to 6in shotgun dual stacks, DIY 6637, Bigg Boost. Foil delete. Riffraff FRx. IH Bellowed Up Pipes. Wicked Wheel Gen 1. TS Chip with canned tunes *Wrecked 5/16


1999 F250 XLT ECSB 2wd Auto. Hydra chip, gauges, 6637, Army OD Green on stock rims...
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post #5 of 9 Old 03-04-2014, 07:37 AM
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Do you lose steering when brake pedal is pressed?


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post #6 of 9 Old 03-04-2014, 07:41 AM
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It could be a couple of things. Sticking caliper or air in the system. I would bleed your brakes first before buying parts. Start at the passenger rear then driver rear. Followed by the front passenger and then the frond drivers. Pump the brakes with the key off tell firm and hold. Have someone crack the bleed screw and wait tell the fluid stops and shut the bleed screw. Then pump again. Do not lift your foot while the bleed screw is open or you will get more air in the system. Also make sure you keep the master cylinder full. Also BRAKE FLUID EATS YOUR PAINT. Clean any fluid that gets on your paint. To help keep the mess down find a hose that will go over the bleed screw and route it to a bottle. Since your truck is over 10 years old I would flush your brake system. You just bleed each one tell you get clean fluid.


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post #7 of 9 Old 03-04-2014, 01:38 PM
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remove the calipers and clean and grease the slider pins.

03 F250 XLT
5.4
182,000 and still goin strong
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post #8 of 9 Old 03-05-2014, 08:32 PM Thread Starter
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Thanks guys!

I don't lose power steering, but I have noticed lately, the truck will NOT creep in drive like it used to. Like the brakes are on. I alsoe noticed, when idling in a parking lot, making a turn, the brakes grab. the truck almost stop if I don't give it gas!


I have bled the system but not to the extend mentioned above. I will try that when I get some help on it. Also, I probably need to do slide pins again..... It sat in the yard from thanksgiving till beginning of February till I could get the tranny rebuilt so theres no telling what bugs got in it.....



1999 F250 Lariat 4X4 Offroad
Under the hood: 7.3 diesel, 4in straight piped to 6in shotgun dual stacks, DIY 6637, Bigg Boost. Foil delete. Riffraff FRx. IH Bellowed Up Pipes. Wicked Wheel Gen 1. TS Chip with canned tunes *Wrecked 5/16


1999 F250 XLT ECSB 2wd Auto. Hydra chip, gauges, 6637, Army OD Green on stock rims...
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post #9 of 9 Old 03-09-2014, 06:21 AM Thread Starter
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Greased my slide pins and it seems to be better but I still need to bleed the system...

~ The Maddawg



1999 F250 Lariat 4X4 Offroad
Under the hood: 7.3 diesel, 4in straight piped to 6in shotgun dual stacks, DIY 6637, Bigg Boost. Foil delete. Riffraff FRx. IH Bellowed Up Pipes. Wicked Wheel Gen 1. TS Chip with canned tunes *Wrecked 5/16


1999 F250 XLT ECSB 2wd Auto. Hydra chip, gauges, 6637, Army OD Green on stock rims...
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