Brake pedal goes to floor when turning right - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 03-25-2018, 06:57 AM Thread Starter
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Brake pedal goes to floor when turning right

I have a 06 F350 dually. For the past week or so my truck has been having a weird issue. Whenever I turn the wheel all the way to the right the brake pedal will go to the floor and it barely brakes and my TBC code will come on. Once I straighten the wheel the brake pedal will feel normal after I pump it once or twice. I have ordered a new master cylinder but I have a feeling it not gonna fix my problem. Has this happened to anyone else. The truck has a 2.5" level kit and 315/70/17 tires

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post #2 of 14 Old 03-25-2018, 07:17 AM
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I would suspect the hydro boost system. Has spool valves and such that can cause wierd things with the pedal.

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post #3 of 14 Old 03-25-2018, 07:41 PM Thread Starter
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But would that allow the pedal to go all the way to the floor. I would think the pedal should only be able to go so far if the master cylinder hydraulics are good

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post #4 of 14 Old 03-25-2018, 09:12 PM
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What's your brake fluid level? Have you tried bleeding the calipers?

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post #5 of 14 Old 03-26-2018, 07:36 AM
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Quote:
Originally Posted by modular89 View Post
But would that allow the pedal to go all the way to the floor. I would think the pedal should only be able to go so far if the master cylinder hydraulics are good

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Yes it can cause pedal drop.
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post #6 of 14 Old 03-26-2018, 07:58 AM
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Make sure that the brake lines are not kinking, binding or twisting when making a turn

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post #7 of 14 Old 03-26-2018, 06:52 PM Thread Starter
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Brake fluid is full and I have never opened up the brake system to allow air in it. I have also checked the hoses when turning. Maybe I will replace the hydroboost with the master cylinder

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post #8 of 14 Old 05-28-2019, 06:51 AM
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What did you ever find out was problem? I’m having same exact problem now on my 05 250. I have replaced master cylinder, power steering pump, high pressure lines and hydro boost .. 2 mechanics looked at it and are stumped.. please and thank you for help..
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post #9 of 14 Old 10-15-2019, 06:33 AM
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I'm experiencing this same issue, its either direction at lock for me. Scary af. I'll start checking these things today. Unfamiliar with a system like this so I'll be learning. Doing my trans service and was going to my brakes at the same time this weekend.
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post #10 of 14 Old 10-15-2019, 02:07 PM
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Power steering fluid is a little bit low and a bit dirty, brake fluid is dirty but full.
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