C both
C both
A bad brake booster will cause a vacuum leak, result in poor braking, and even poor engine performance. The brake booster has a large diaphragm which can fail and leak.
Probably have a defective power brake booster or the vacuum supply to the booster is restricted or leaking.
Did you check the Power Brake booster vacuum hose? Also the booster itself make have a busted diaphragm.
yes but it will not pass the safety check
lots or none
Sounds like your power brake booster diaphragm is busted or there is a leak in the vacuum line going to the brake booster.
on a vacuum type booster there is usually a vacuum leak. either on the rubber line that runs from the booster to the engine, or a hole in the diaphragm inside the booster. the rubber line is easy and inexpensive to replace so i would check it first. if you have a hole in the diaphragm the only way to fix it is to replace the booster.
When the brakes are released and the engine is running, there is a vacuum on both sides of the booster's diaphragm the control valve directs air movement in the power booster resulting in a assist to pedal effort when needed.
Mounted between the Master Cylinder & the Firewall on the driver's side. It is the large vacuum diaphragm with the vacuum hose going to it.
I'm not a mechanic / technician but the power brake booster is between the brake fluid reservoir and the firewall on your 2001 Ford Explorer ( located in the engine compartment on the drivers side )
If it is referring to the diameter of the booster diaphragm assembly itself then the 11 would put out more force than a 7 would. There is more area in an 11 than there is a 7 and the greater the force being put out on the diaphragm itself from sub-atmospheric pressure. Basically more force generated out of the 11 over a 7.......Only problems, much larger and could potentially draw too much vacuum from the engine.