2 minor problems, need some input
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 1,164
Likes: 1
2 minor problems, need some input
Getting a grinding sound coming from the right rear brake when slowing down to a stop, and if I ease my foot on the the brake and turn the wheel(while stopped) more grinding sounds...I visually checked my pads and rotors and everything looks OK....what could this be? Does this sound mean I need to change pads? The brakes still work and cause the front tires to screech, but they have felt better. also the grinding sound lessens after driving and braking hard for a while. I do have to pump the brake when braking at speed because the pedal slowly sinks down. I have no warning lights or messages....what could this be.
2nd problem... Im still getting a check engine light coming on(codes read (intake air pressure sensor reading high voltage) I changed the sensor and the light went away but has come back...could it be the car is starving for air from this humid hot weather? I do have a cam224/228/595/114 and lt headers though with a tune...I have the Z06 lid with K/N installed...do I need to get a better air box? It seems I have not had this problem in cool weather...
So anyone have this problem before as well? Please chime in
2nd problem... Im still getting a check engine light coming on(codes read (intake air pressure sensor reading high voltage) I changed the sensor and the light went away but has come back...could it be the car is starving for air from this humid hot weather? I do have a cam224/228/595/114 and lt headers though with a tune...I have the Z06 lid with K/N installed...do I need to get a better air box? It seems I have not had this problem in cool weather...
So anyone have this problem before as well? Please chime in
Burning Brakes
Joined: Feb 2005
Posts: 752
Likes: 1
From: Tulsa OK
Getting a grinding sound coming from the right rear brake when slowing down to a stop, and if I ease my foot on the the brake and turn the wheel(while stopped) more grinding sounds...I visually checked my pads and rotors and everything looks OK....what could this be? Does this sound mean I need to change pads? The brakes still work and cause the front tires to screech, but they have felt better. also the grinding sound lessens after driving and braking hard for a while. I do have to pump the brake when braking at speed because the pedal slowly sinks down.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
First thing you should do .... like NOW ... is check the fluid level in the brake fluid reservoir. When you say that:
I do have to pump the brake when braking at speed because the pedal slowly sinks down
That is a sign that you may have a fluid leak, and if the reservoir drops to where you pull air into the system you will have NO BRAKES. If no leak of fluid, you may have a problem with the master cylinder booster. Start the car and at a stop step on the brake pedal and keep an even force on it. Does it sink all the way to the floor ??? If so, you have a fluid leak. If the pedal sinks slowly, but stops before hitting the floor, then the power brake booster is leaking.
Check for any/all DTCs posted for the car. There is a chance there are Cxxxx codes set by the brake problem. Also, if your MIL (Check Engine) is on you'll have one or more Pxxxx codes that will help diagnose the reason for the light, it may be a new/different problem than the intake pressure sensor.
I do have to pump the brake when braking at speed because the pedal slowly sinks down
That is a sign that you may have a fluid leak, and if the reservoir drops to where you pull air into the system you will have NO BRAKES. If no leak of fluid, you may have a problem with the master cylinder booster. Start the car and at a stop step on the brake pedal and keep an even force on it. Does it sink all the way to the floor ??? If so, you have a fluid leak. If the pedal sinks slowly, but stops before hitting the floor, then the power brake booster is leaking.
Check for any/all DTCs posted for the car. There is a chance there are Cxxxx codes set by the brake problem. Also, if your MIL (Check Engine) is on you'll have one or more Pxxxx codes that will help diagnose the reason for the light, it may be a new/different problem than the intake pressure sensor.
Thread Starter
Burning Brakes
Joined: Aug 2003
Posts: 1,164
Likes: 1
First thing you should do .... like NOW ... is check the fluid level in the brake fluid reservoir. When you say that:
I do have to pump the brake when braking at speed because the pedal slowly sinks down
That is a sign that you may have a fluid leak, and if the reservoir drops to where you pull air into the system you will have NO BRAKES. If no leak of fluid, you may have a problem with the master cylinder booster. Start the car and at a stop step on the brake pedal and keep an even force on it. Does it sink all the way to the floor ??? If so, you have a fluid leak. If the pedal sinks slowly, but stops before hitting the floor, then the power brake booster is leaking.
Check for any/all DTCs posted for the car. There is a chance there are Cxxxx codes set by the brake problem. Also, if your MIL (Check Engine) is on you'll have one or more Pxxxx codes that will help diagnose the reason for the light, it may be a new/different problem than the intake pressure sensor.
I do have to pump the brake when braking at speed because the pedal slowly sinks down
That is a sign that you may have a fluid leak, and if the reservoir drops to where you pull air into the system you will have NO BRAKES. If no leak of fluid, you may have a problem with the master cylinder booster. Start the car and at a stop step on the brake pedal and keep an even force on it. Does it sink all the way to the floor ??? If so, you have a fluid leak. If the pedal sinks slowly, but stops before hitting the floor, then the power brake booster is leaking.
Check for any/all DTCs posted for the car. There is a chance there are Cxxxx codes set by the brake problem. Also, if your MIL (Check Engine) is on you'll have one or more Pxxxx codes that will help diagnose the reason for the light, it may be a new/different problem than the intake pressure sensor.
And I just got bilsteins installed a few weeks ago...maybe the mechanic id something wrong? I didnt have any grinding sound a week ago though..
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Mark,
You ask .... So you think that its not the pads and rotors? maybe the caliper?
No ... I think you either have a fluid leak (could be the Master Cylinder, in a brake line, or a piston in the caliper) or a leak in the vacumn booster for the brake system.
You need to do as I asked. At a stop, step on the brake pedal ... does it go to the floor ?? If so you have a fluid leak (or a bad master cylinder piston seal) If it stops before hitting the floor your vacumn booster unit is bad.
Try that test first and it will help narrow down where the problem is. Also check for any DTCs ... especially any Cxxxx codes.
You ask .... So you think that its not the pads and rotors? maybe the caliper?
No ... I think you either have a fluid leak (could be the Master Cylinder, in a brake line, or a piston in the caliper) or a leak in the vacumn booster for the brake system.
You need to do as I asked. At a stop, step on the brake pedal ... does it go to the floor ?? If so you have a fluid leak (or a bad master cylinder piston seal) If it stops before hitting the floor your vacumn booster unit is bad.
Try that test first and it will help narrow down where the problem is. Also check for any DTCs ... especially any Cxxxx codes.
