brakes hard upon start up, then normal after I start car
03-07-15, 11:49 AM
#1
Lead Lap
Thread Starter
brakes hard upon start up, then normal after I start car
I noticed last night that the brake pedal was hard when I tried to start the car...then it softened up after I started the car.
does this mean my booster is starting to go bad ?
it usually feels normal and soft to the tap when I press the pedal and hit the start button.
any thoughts ?
does this mean my booster is starting to go bad ?
it usually feels normal and soft to the tap when I press the pedal and hit the start button.
any thoughts ?
03-07-15, 03:26 PM
#4
Should be fairly normal if u press the pedal a number of times. Now if your pedal goes down all the way when you brake you could have seized calipers which i am having the problem right now.... or you need to change your pads, or water is in your brake fluid system.
03-08-15, 01:04 AM
#5
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Your brake booster Check valve is failing
There is a hose from the engine intake to the brake booster. This hose is attached to a small one way valve.
Normally if it fails it allows the booster to pull air inside causing what you feel.
Replace that valve and the rubber o-ring and it should be good to go
There is a hose from the engine intake to the brake booster. This hose is attached to a small one way valve.
Normally if it fails it allows the booster to pull air inside causing what you feel.
Replace that valve and the rubber o-ring and it should be good to go
03-08-15, 11:14 PM
#7
Your brake booster Check valve is failing
There is a hose from the engine intake to the brake booster. This hose is attached to a small one way valve.
Normally if it fails it allows the booster to pull air inside causing what you feel.
Replace that valve and the rubber o-ring and it should be good to go
There is a hose from the engine intake to the brake booster. This hose is attached to a small one way valve.
Normally if it fails it allows the booster to pull air inside causing what you feel.
Replace that valve and the rubber o-ring and it should be good to go
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03-09-15, 11:46 AM
#9
Lead Lap
Thread Starter
are u sure about this diagnosis ? I'm taking it to the dealer today.
Your brake booster Check valve is failing
There is a hose from the engine intake to the brake booster. This hose is attached to a small one way valve.
Normally if it fails it allows the booster to pull air inside causing what you feel.
Replace that valve and the rubber o-ring and it should be good to go
There is a hose from the engine intake to the brake booster. This hose is attached to a small one way valve.
Normally if it fails it allows the booster to pull air inside causing what you feel.
Replace that valve and the rubber o-ring and it should be good to go
03-10-15, 05:29 PM
#11
Lead Lap
Thread Starter
ok guys had the car checked out at longo lexus in el monte, they took it overnight and said everything was ok.
I feel comfortable taking their word for it. The service advisor Paul and all they other guys seem very knowledgeable with everything.
I gotta say, they have the best customer service ever. I was given a loaner as well. U can't beat lexus service. Mind you my car is a 2007 and it has 108,000 miles.
I feel comfortable taking their word for it. The service advisor Paul and all they other guys seem very knowledgeable with everything.
I gotta say, they have the best customer service ever. I was given a loaner as well. U can't beat lexus service. Mind you my car is a 2007 and it has 108,000 miles.
