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F150 braking issue.

DynaBro

Well-Known Member
Local time
10:45 AM
Joined
Aug 13, 2023
Messages
371
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Location
Minneapolis
Wasn't the booster, wasn't the pads, isn't a vacuum (I don't think). So what is this problem? Ecoboost FX4. Truck will lose breaking at like 1mph, for example when in line behind someone at gas pumps, pedal will become very stiff, there is a groaning sound from what we think is the lower middle of the engine compartment or maybe even down at axle. I can recreate this issue at will and we had a hand on the ABS unit and it was not coming from there. I replaced the pads and booster, no luck. The groaning happens, the pedal is hard, truck slides forward a bit, I crush the pedal to get it to stop, and then everything is fine again. No issues braking at speed. Any ideas???
 
Sounds like a wheel speed sensor dropping the signal out at low speed. Do you have access to a scan tool that will show ABS data?
 
Sounds like my '98 GMC when both front wheel sensors went and I damn near rear ended everything in sight! Pull the ABS fuse and see what it does...
 
Wasn't the booster, wasn't the pads, isn't a vacuum (I don't think). So what is this problem? Ecoboost FX4. Truck will lose breaking at like 1mph, for example when in line behind someone at gas pumps, pedal will become very stiff, there is a groaning sound from what we think is the lower middle of the engine compartment or maybe even down at axle. I can recreate this issue at will and we had a hand on the ABS unit and it was not coming from there. I replaced the pads and booster, no luck. The groaning happens, the pedal is hard, truck slides forward a bit, I crush the pedal to get it to stop, and then everything is fine again. No issues braking at speed. Any ideas???
“ STIFF “. ……. “ GROANING SOUND “…..
“ SLides Forward A Bit “….

Mmmmmmmm When Was The Last time
You Had An Exam ???

Say …. Noticed Youre In Minnesota….
R U In MoFoHoCoJo’s Neighborhood???

Maybe You Could Be neighborly & stop by ?

Hahahahahahaha…..
 
“ STIFF “. ……. “ GROANING SOUND “…..
“ SLides Forward A Bit “….

Mmmmmmmm When Was The Last time
You Had An Exam ???

Say …. Noticed Youre In Minnesota….
R U In MoFoHoCoJo’s Neighborhood???

Maybe You Could Be neighborly & stop by ?

Hahahahahahaha…..
I am too green here to understand this. That's a member?
 
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