2016 350 brake oddities - Ford Powerstroke Diesel Forum
6.7 Drivetrain Problems (2011-2016) 6.7 Drivetrain Problems

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post #1 of 34 Old 06-12-2016, 07:23 AM Thread Starter
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Question 2016 350 brake oddities

So this one I've searched for and nothing seems to fit.

Brand new 2016 FX4 package 350. At about 1400 miles commuting home suddenly the left front break grabs a few times (10-15 times in 20 miles). Pulls the wheel to the left a little, get a small pulse in the pedal, but this happened when not on the pedal as well. Drove it the next day, then to Denver and towed corporate HQ back 200 miles with nary an indication that this was happening. So at this point I figured it was a weird one time thing. Get in the truck yesterday and it's back. The truck has 2500 miles now.

I'd called Ford after the first occurance and they said that there is nothing they can do if the problem can't be seen of felt by the techs, since the problem seemed to be gone, they encouraged me not to bring it in.

I've read about sticking caliper pins, could this be it? Could this be a stearing and not braking? No dash lights, no smells, no other symptoms that I can find at all.

Thoughts?

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post #2 of 34 Old 06-12-2016, 08:23 AM
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Probably a sticking pin or warped rotor. Stay on ford until they resolve it
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post #3 of 34 Old 06-12-2016, 08:39 AM Thread Starter
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Originally Posted by heleonardman View Post
Probably a sticking pin or warped rotor. Stay on ford until they resolve it
That is my plan this week. Thanks for the input on the issue, the pin seems like the most likely culprit to me too.

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post #4 of 34 Old 06-13-2016, 08:52 AM
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I would lean more to a bad wheel speed sensor. Did the traction or stability light up on the dash when this happened? Sound like it thought you were going into a roll/slide and braked one wheel. Did the pulse have a grinding sound to it as-well?

I guess last question is, was this on the freeway at straight high speeds or where you turning like on back roads or changing lanes if on the freeway ?

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post #5 of 34 Old 06-13-2016, 09:00 AM Thread Starter
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Originally Posted by mwe_060 View Post
I would lean more to a bad wheel speed sensor. Did the traction or stability light up on the dash when this happened? Sound like it thought you were going into a roll/slide and braked one wheel. Did the pulse have a grinding sound to it as-well?

I guess last question is, was this on the freeway at straight high speeds or where you turning like on back roads or changing lanes if on the freeway ?

No traction light, usually slow roads and turning, but has happened at highway speeds straight as well. Yes there is a grinding sound, I figured it was ABS activating.
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post #6 of 34 Old 06-13-2016, 09:52 AM Thread Starter
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Further Info

So after the wheel sensor comment drove 10 miles with TC and Activ Trac off. Still happened, but less frequently and less severe.

Does this confirm or refute the diagnosis - meaning can the driver fully defeat all traction control on these trucks, because if not then my test means very little. Right?
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post #7 of 34 Old 06-13-2016, 12:00 PM
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Quote:
Originally Posted by Mrcwineman View Post
So after the wheel sensor comment drove 10 miles with TC and Activ Trac off. Still happened, but less frequently and less severe.

Does this confirm or refute the diagnosis - meaning can the driver fully defeat all traction control on these trucks, because if not then my test means very little. Right?

2 ways to have all traction and stability controls off.
1. pull the fuse related to it in the main fuse box.
2. be in 4x4 low.

When you push the button on the dash, it limits how much it will counteract situations to i think 45 mph, give or take. when you push the button and hold it for 15 seconds or so it turns it almost all the way off but i have found it sometimes will still interfere in some situations. and as the same before it turns its self back on after a certain speed.


hope this helps

2011 Ford F-250 Super Duty Lariat
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01/24/2017 110,000 MI
S&B CAI
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post #8 of 34 Old 06-13-2016, 12:06 PM Thread Starter
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Quote:
Originally Posted by mwe_060 View Post
2 ways to have all traction and stability controls off.
1. pull the fuse related to it in the main fuse box.
2. be in 4x4 low.

When you push the button on the dash, it limits how much it will counteract situations to i think 45 mph, give or take. when you push the button and hold it for 15 seconds or so it turns it almost all the way off but i have found it sometimes will still interfere in some situations. and as the same before it turns its self back on after a certain speed.


hope this helps
This does help - to my mind that would mean that the decrease in grabbing with TC "off" means that the system is less sensitive, because it is still on even though it says it is off, would indicate that the issue is indeed related to TC interference i.e. the suggested bad wheel sensor. That begs the question, why doesn't the traction light come on when it happens wth TC on?

I have an appointment with the Ford shop in town Wednesday to see if they can hunt it down - I just hope that I can get the issue to manifest when the tech is in the car so they don't think I'm crazy and so Ford will cover it.

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post #9 of 34 Old 06-13-2016, 06:27 PM
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I wish you the best of luck. if you still have issues after dealer trip let us know, I have some pinpoint test from a shop manual that might help later on. Also actual tire and brake shops are way better than dealerships to find problems like this.

Also, All of these truck have sensitivity issues when it comes to stability control. Even my personal and work truck if i turn into a driveway or something kinda fast and it has a dip or bump it will activate the abs for a quick second. I've even had it do it on real curvy roads and hitting potholes and such. I guess its a good thing for some. But for me being a ex professional driver it is a little aggravating. But i can say i see far less f250s and such wrecked compared to other makes. I assume this to the over active TC, STAB and Roll controls.

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3.31 ELOD 4X4 6.7 Power stroke
01/24/2017 110,000 MI
S&B CAI
SCT X4 Tuner
Running a tow tune by AMDP
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( on-demand exhaust brake from the AMDP tune).LED interior,LED AUX back-up,Westin HDX grill guard,High-idle,Aux 55 Gal Transfer tank,Draw-Tite Hide-A-Hitch gooseneck,LED puddle lights.4000x2 LED lights up front for dark country roads. Access Low profile bed cover.
Roof clearance lights.
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post #10 of 34 Old 06-14-2016, 10:49 AM
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Check to see if any codes. Might be a communication problem.

Larry

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