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1

+1 on @Moab's answer about the master cylinder, that is a classic symptom of a bad master cylinder. In regards to the revving when not on the gas, it sounds like your ECU is getting confused by something. If you have a check engine light on pull the codes and see if there is a component failing. Another thing to check for is a vacuum leak. If air is ...


1

Sounds like you have 2 problems. Brake pedal that goes down to the floor at a red light is a bad Master Cylinder, replace it Common issue as cars get higher mileage is the Thottle Body and throttle plate get gunked up, use an approved throttle body cleaner in a spray can to thoroughly clean the TB and idle air control valve and passage.


1

Shifting into neutral CANNOT, and DOES NOT allow for more controllable nor more efficient braking. Torque converters "Lock-Up" when the car is being Driven by the engine. NOT upon deceleration. When the brake pedal is depressed enough to cause the "Brake-Lights" to illuminate, the torque converter is taken OUT of the equation. Also, if operating properly, ...


1

You should leave the downshifting to the transmission. Sounds like you're doing it wrong anyway. The abrupt "jerk" that you speak of means you're going Too Fast for the gear you've selected. Of course if you're towing a heavily loaded trailer, you could manually downshift to assist the cars brakes to avoid the possibility of overheating them. But the engine ...


7

Basically, yes. Automatics don't have a clutch per se, but you're causing additional wear and tear on the internals. Basically you're reversing the power flow -- instead of the engine driving the wheels, you're driving the engine with the wheels. Obviously this occurs normally when you decelerate, but by downshifting you're increasing the amount of force ...



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