Hi
2011 Expedition KR. All brake components replaced less than 5000 miles ago. Now for the issue. This has been going on for less than a week. It felt like my parking brake was on when I took off from a traffic light. It was not engaged. I pull into the driveway and it has a slight incline. I put the truck in neutral and it does not roll back, after 5 seconds it starts to slowly roll back and 10-20 seconds (20-25ft) it is rolling freely. No high heat from any of the calipers and no pulling when the brakes are engaged. When I drive and use the brakes I can now feel the 15 - 20 second full release and the feeling of the parking brake like hold at take off from a stop.
Took the truck to the shop Friday. They think it is the brake booster!!. I am not losing brake pedal pressure when I drive or when I hold the pedal down. I have had a vehicle with a failed booster before. My friend and I are looking at it today. When I turned the truck off he had his head down buy the front drivers side tire. He says he hears air leaking around the ABS unit at the leak lasts about 20 seconds. I got out and he started the truck, let it run for a 30seconds and turned it off and I could hear the air leak.
I have looked on the forums and you tube and I am not finding anything. Any ideas would be greatly appreciated!
Thanks
2011 Expedition KR. All brake components replaced less than 5000 miles ago. Now for the issue. This has been going on for less than a week. It felt like my parking brake was on when I took off from a traffic light. It was not engaged. I pull into the driveway and it has a slight incline. I put the truck in neutral and it does not roll back, after 5 seconds it starts to slowly roll back and 10-20 seconds (20-25ft) it is rolling freely. No high heat from any of the calipers and no pulling when the brakes are engaged. When I drive and use the brakes I can now feel the 15 - 20 second full release and the feeling of the parking brake like hold at take off from a stop.
Took the truck to the shop Friday. They think it is the brake booster!!. I am not losing brake pedal pressure when I drive or when I hold the pedal down. I have had a vehicle with a failed booster before. My friend and I are looking at it today. When I turned the truck off he had his head down buy the front drivers side tire. He says he hears air leaking around the ABS unit at the leak lasts about 20 seconds. I got out and he started the truck, let it run for a 30seconds and turned it off and I could hear the air leak.
I have looked on the forums and you tube and I am not finding anything. Any ideas would be greatly appreciated!
Thanks