have a 1998 z71,brakes pulsated when braking,i put on new rotors,i dont
feel it in the pedal but the truck does not stop smooth,like it still
pulsating.can it be in the abs,or any ideas.t

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"bassinbob13" <bassinbob13 (AT) yahoo (DOT) com> wrote

Me thinks the Front rotors are not ON properly. Are they one piece or
composite?
My original composite rotors were thinner, allowing the hub to protrude
into the rim center.
If not put on properly they would not sit flush on the rotor.

If you think its the ABS, try pulling the fuse and take it for a ride.

Cheers

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On Dec 8, 1:08*pm, "bassinbob13" <bassinbo... (AT) yahoo (DOT) com> wrote:
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So.........it does have a pulsing pedal..???
OR.....it does NOT have a pulsing pedal.. ???


2 posts......same day......confilicting info.


Anywhooooo.......
have you thunked maybe the pulse MAY be coming from the rear....and
NOT the front ??
.WAS ANY brake work done to this thing just PRIOR to the symptom
showing up??
Have you had the brakes inspected (FOR FREE) at a brake shop??

(wink wink)


MOST COMMON cause of pulsing brakes, (in the pedal or
not).........are..........
Warped rotors
Cheap REPLACEMENT rotors that need to be machined
Warped Rear rotors or drums
Calipers loose...(guide worn or guide pin bushings......letting
caliper move around)



A suggestion ???
Clamp off BOTH front brake hoses at the calipers, go for a test
drive, USE COMMON SENSE ......don't go any faster than need be and use
a street that's isolated as much as possible from traffic.
See if the symptom goes away. If it does...then unclamp ONE of the
hoses and see if the symptom comes back. THEN ....clamp the hose
again, unclamp the OTHER side and check for the symptom.
IF.....the symptom is narrowed down to the FRONT brakes using this
technique, then clamp off the REAR hose and test drive it again.
Because of your limited diagnostic experience on brake
systems......we need to try and narrow down the AREA of the symptom
then ....scrutinize the brakes in that area. (see list above)



ANYWHOOOOOO.......
still not clear after reading BOTH of your posts if the pedal
pulsates or not. Either way...if you've replaced the rotors and the
EXACT same symptom is still present then it's time to either do the
test above,
or take ALL THE TIRES off.....and do a solid inspection of the brake
linings, calipers and caliper mounting, and condition of the REAR
brakes also.


Pulsating is one the easiest symptoms to cure.....and using the list i
posted , you should be able to find it easy enough.