Name The Failing Part! Video Inside... Fixed!
#1
Name The Failing Part! Video Inside... Fixed!
Well crap... After I have been singing such good praises about my truck, it has let me down a bit. I jumped in it today after work to warm it up so that we could go pick up 2 pallets of rock/wool insulation from Home Depot.
As soon as it fired up, the brake pedal started pulsing very quickly when I was applying the brakes. I let it warm up for 10 minutes or so, then checked the pulse in the pedal and it was the same. Thinking it was worth a shot, I shut it off and turned it back on again, but still the pulsing and noise was there.
I checked the power steering fluid and it is full. I checked the brake fluid and it is full. I took a quick look at everything paying special attention to the pulley on the power steering pump, and everything looks and sounds normal. No fluid leaks under the truck and nothing out of the ordinary.
The brakes did clear up a bit it seems, or maybe it is my wishful thinking, but still pulse rapidly and make the sound in the video when pressing hard on them. You can hear the pulse sound when turning at low speeds as well, but I cannot feel it in the wheel.
My initial suspects are the power steering pump or the hydro-boost system. The problem is I don't know much about either one of these systems, so which may be failing escapes me. Maybe the problem is another system or part I have not even thought about?
I was hoping that some air was trapped in the system from the recent steering gear replacement and the cold temperatures we have been having caused the hydro-boost to throw a fit and it would work itself out. 30 minute round trip and some idling at the Home Depot did not change the symptoms. I did bleed the system very well though ensuring all the air was out I could get to when I changed the steering gear.
I am open to ideas or suggestions before I tear into it.
I do have to have this resolved before our upcoming camping trip, or SC gets to keep my $350 for nothing...
Updates to the thread title and video description once the issue has been taken care of.
Any input or insight you may have is appreciated, thanks.
As soon as it fired up, the brake pedal started pulsing very quickly when I was applying the brakes. I let it warm up for 10 minutes or so, then checked the pulse in the pedal and it was the same. Thinking it was worth a shot, I shut it off and turned it back on again, but still the pulsing and noise was there.
I checked the power steering fluid and it is full. I checked the brake fluid and it is full. I took a quick look at everything paying special attention to the pulley on the power steering pump, and everything looks and sounds normal. No fluid leaks under the truck and nothing out of the ordinary.
The brakes did clear up a bit it seems, or maybe it is my wishful thinking, but still pulse rapidly and make the sound in the video when pressing hard on them. You can hear the pulse sound when turning at low speeds as well, but I cannot feel it in the wheel.
My initial suspects are the power steering pump or the hydro-boost system. The problem is I don't know much about either one of these systems, so which may be failing escapes me. Maybe the problem is another system or part I have not even thought about?
I was hoping that some air was trapped in the system from the recent steering gear replacement and the cold temperatures we have been having caused the hydro-boost to throw a fit and it would work itself out. 30 minute round trip and some idling at the Home Depot did not change the symptoms. I did bleed the system very well though ensuring all the air was out I could get to when I changed the steering gear.
I am open to ideas or suggestions before I tear into it.
I do have to have this resolved before our upcoming camping trip, or SC gets to keep my $350 for nothing...
Updates to the thread title and video description once the issue has been taken care of.
Any input or insight you may have is appreciated, thanks.
#2
#3
My truck doesn't have ABS, so that is out...
The sound is present when turning the steering wheel at slow forward speed without applying the brakes, so this is why I was leaning toward the power steering pump. Maybe your right though and the power steering pump either works or it doesn't and since we made a 30 minute round trip journey, the pump is fine.
In regard to the hydro-boost, I am having a hard time finding the right part. At Rock Auto if you search for hydro, the brake cylinder comes up like in the second picture.
Does this look right for the possibly faulty hydro-boost?
More Information for MOTORCRAFT BRB33
Or, is this the part that may be causing the issue?
http://www.rockauto.com/en/moreinfo....sn=488&jsn=488
The sound is present when turning the steering wheel at slow forward speed without applying the brakes, so this is why I was leaning toward the power steering pump. Maybe your right though and the power steering pump either works or it doesn't and since we made a 30 minute round trip journey, the pump is fine.
In regard to the hydro-boost, I am having a hard time finding the right part. At Rock Auto if you search for hydro, the brake cylinder comes up like in the second picture.
Does this look right for the possibly faulty hydro-boost?
More Information for MOTORCRAFT BRB33
Or, is this the part that may be causing the issue?
http://www.rockauto.com/en/moreinfo....sn=488&jsn=488
#4
#5
Sous, I'm leaning toward the PS Pump because you state you hear it when turning. Have you tried taking a piece of hose to the pump and the other end to your ear, then have the wife push the brake pedal. Also have her turn the steering wheel. You could do the same thing on the hydroboost. You'll be able to hear the sound to the hose.
#6
#7
Sous, I'm leaning toward the PS Pump because you state you hear it when turning. Have you tried taking a piece of hose to the pump and the other end to your ear, then have the wife push the brake pedal. Also have her turn the steering wheel. You could do the same thing on the hydroboost. You'll be able to hear the sound to the hose.
Not sure what you mean by hearing the sound with my wife at the wheel, I imagine I won't be able to hear much of anything next to the engine.
I am thinking that I will try and bleed the system again with the instructions from Trey as a last ditch effort to fix the problem easily and quickly.
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#8
I have no idea if it can apply to your situation here but...I had an issue last summer where my pedal would intermittently pulse when brakes were applied, cruise control would flick off when I ht a bump and I'd have to reset it. Then my ABS light came on. I got under the truck thinking that I was going to replace the speed sensor in my rear but I found that the connector was not on tight. Pushed it on and problems solved.
#9
Mark, cruise control works fine. Activates, holds speed and cancels with the tap of the brake.
The brake pedal has no pulsing unless I push 1/3 the way down or further and the noise is barely audible when turning at low speed.
I am pretty sure my truck does not have ABS because the wires are cut off at the hubs for the sensors. In addition, the noise happens when the brakes are not applied and turning only.
The brake pedal has no pulsing unless I push 1/3 the way down or further and the noise is barely audible when turning at low speed.
I am pretty sure my truck does not have ABS because the wires are cut off at the hubs for the sensors. In addition, the noise happens when the brakes are not applied and turning only.
#11
So basically I am trying to find the source of the noise using the reverberation of the part up through the hose?
#13
#15
Poor man's stethoscope works good. A long screwdriver with a plastic handle can work to. Wood handle dampens the noise.