somthings wrong

[yewwoodtree]

I have a 1990 Ranger 4x4 with RABS. When I apply the brake pedal at high speed I can feel it pulsing when it shouldn't be. I have completely redone the front and rear brakes along with a new master cylinder and rear abs valve. I have also cleaned the abs sensor. What could be happening? Any impute would be much appreciated. Thanks

 

[pimtool]

Are the front rotors new?

Is it an ABS pulse or warped rotors kinda pulsing?

 

[Yellowsplash]

I suspect warped rotors... Or possibly even loose spindle nuts...

 

[wv_snranger]

This may sound unusual, have you had your tires rotated lately? A oddly-worn (unbalanced for long period of time) tire can magnify warped rotor issues when applying brakes. I had this issue a few months ago after a tire rotation, later figured out it was a tire that had worn unevenly.

 

[94 splash]

well from all the older rangers that i have drove with the rear abs.. u can hardly notice them when they are engaged.... so sounds like u have warped front rotors .. of a loose spindle nut...

 

[yewwoodtree]

yes, I disconnected the electrical plugs to the abs system and it still does it so it must be the rotors. thanks!