Depressing brake before engine is on...
#1
Depressing brake before engine is on...
I was taught ions ago this was bad for the system. Of course we have to now to get the car started. So what's the breakdown on how this no longer damages the system? I am sure there is some technology that keeps things right. Just curious.
#2
How could it possibly damage the system to press the brake pedal before starting the car? It cant... The vaccuum booster holds enough vaccuum to apply the brakes 2-3 times after the engine is turns off or dies, so if you push the brake with the car off, you arent doing anything but using up that supply of vaccuum. It's no different than pushing the brakes while the car is running. Whoever gave you that bit of info is completely off-base and incorrect.
Last edited by RTIS250; 04-21-08 at 01:08 AM. Reason: its late, i cant type.
#3
Stepping on the brake with the engine off is bad for a car... wow... never heard that before... sorry that person who told you this is misinformed. Next time you see this person tell them that putting stickers on your car adds horsepower.
#4
How could it possibly damage the system to press the brake pedal before starting the car? It cant... The vaccuum booster holds enough vaccuum to apply the brakes 2-3 times after the engine is turns off or dies, so if you pretty the brake with the car off, you arent doing anything but using up that supply of vaccuum. It's no different than pushing the brakes while the car is running. Whoever gave you that bit of info is completely off-base and incorrect.
#6
The OP is not really wrong. It was considered taboo to depress the brake while the car is not running in the past. Doing so would potentially place air within the brake lines. For vehicles equipped with the smart-key technology, engineers have factored this in and you will not harm anything by doing so in your ISX50.
#7
How else would you start your IS??? But yeah, back in the day before all of this fancy technology (old school key style) I heard stuff about how it's not good to depress the brake when the car is not running.
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#8
The OP is not really wrong. It was considered taboo to depress the brake while the car is not running in the past. Doing so would potentially place air within the brake lines. For vehicles equipped with the smart-key technology, engineers have factored this in and you will not harm anything by doing so in your ISX50.
#10
This is what I was always told in the past. Todays fancier brake systems aleviate the tendency for this to occur. I am quite sure the engineers had factored everything in when they designed the smart-key technology. A lot of the old GM master cylinders use to leak and maybe it was speculated that depressing the brake would have negaitve impacts. Could be folklore, could be real in some cases, I do remember this many many moons ago. I am surpirsed you never heard of this.
#11
This is what I was always told in the past. Todays fancier brake systems aleviate the tendency for this to occur. I am quite sure the engineers had factored everything in when they designed the smart-key technology. A lot of the old GM master cylinders use to leak and maybe it was speculated that depressing the brake would have negaitve impacts. Could be folklore, could be real in some cases, I do remember this many many moons ago. I am surpirsed you never heard of this.
#13
Nope, ive never heard of this "myth"... Ive owned a ton of cars, ranging in age from 1967 up to 2008... In all my years in trade/tech school ive never heard that either. Brake systems are sealed against air. From the master cylinder to the pistons/wheel cylinders. All you are really doing by turning off the car is eliminating the vaccuum assist.. so the pedal is really hard to press. Otherwise, its no different if the car is running or now. My 67 Chevelle didnt have power brakes.. so the system was exactly the same running or not. Im not sure where this myth originated.. but its most certainly not true.
I heard that a ebay sticker only gives 3hp while a JDM sticker gives 5hp, does the hp stack if you run 2 of the same type of sticker thou? or do they have to be different?
#14
#15
Nope, ive never heard of this "myth"... Ive owned a ton of cars, ranging in age from 1967 up to 2008... In all my years in trade/tech school ive never heard that either. Brake systems are sealed against air. From the master cylinder to the pistons/wheel cylinders. All you are really doing by turning off the car is eliminating the vaccuum assist.. so the pedal is really hard to press. Otherwise, its no different if the car is running or now. My 67 Chevelle didnt have power brakes.. so the system was exactly the same running or not. Im not sure where this myth originated.. but its most certainly not true.