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Bad Motorcraft Power Brake Booster Replacement from Dealership?
seeuuaye08 posted a topic in Brakes, Chassis & SuspensionI have a 2008 Ford Edge Limited 2WD that recently showed obvious signs of a failed brake booster (i.e. hard brake pedal, no give when engine starts and foot is on the pedal, hissing sound/vacuum leak when brake pedal is pushed). I removed the brake booster and went up to the parts department at my local Ford dealership to get an OEM Motorcraft brake booster. Installed the new brake booster, put everything back together, bled the master cylinder of air and now there is no resistance in the pedal AT ALL. Pumping the brakes does nothing and if you hold down the pedal to the floor there is a noticeably louder hiss coming from near the pedal where the booster arm connects to the brake pedal. The engine will also drop in idle if you hold the pedal down indicating to me a vacuum leak. I'm positive everything is hooked back up correctly and there is no other vacuum leak in the engine bay because the hissing is only heard in the cabin when I press the brake pedal down. Has anyone had this problem with a new Motorcraft brake booster? Is it possible there is something else I'm missing? Will the dealership let me exchange the new, failed brake booster for another one? It did say on the receipt that returned parts must not have been installed but how are you supposed to test a brake booster without installing it first?