Having problems with your 1991 Nissan Pathfinder ?
Fading brake pedal when engine running , have replace front pads, master cylinder and bleed entire system, pedal is firm with engine off but once started pedal fades to floor
Hold pedal down firmly with vehicle not running. Now start it up still holding pedal down firmly. Does it go to the floor when engine is started? If so I would look at the brake booster. It may be defective.
Repair Help & Product Troubleshooting for 1991 Nissan Pathfinder
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