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Dave 7/28/2018

2005 Isuzu Ascender S 6 Cyl 4.20L


Isuzu Denver rodeo 2005

Have changed master cylinder shoes pads drums bleed brakes even changed the ABS pump and bleed the brakes again. Pedal still soft to the floor. Please help

1 Answer


Jimm 7/28/2018

First question - did you bleed the master cylinder of all residual air (known as a bench bleed) before installing to the vehicle? If not, then the residual air contained within the master cylinder will cause the low or soft brake pedal condition.

The brake master cylinder must be removed and the bench bleed procedure performed. Reference the www.autoMD.com website and the 'How-To-Guides' for the bleeding steps.

Then, after the master cylinder is re-installed, perform the regular brake system bleed at each wheel position. Be sure to check and add brake fluid as needed during this procedure.


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