When i brake on my 2003 supercrew, it sounds almost as if a horn is blowing. very annoying
Hello, You may have a bad brake booster, there can be a check valve in the feed line to the booster. You need to have a pressure check done on the brake booster. Be careful not to use any chemical which can dissolve rubber or plastic if you use a spray around the booster. A water spray may indicate a leaking booster if you test it with the engine running. The rpm will change from a leak.
The ABS system should show a "check light" if it is malfunctioning. The modulation inside the brake unit possibly could make noise.
The Traction control, if equipped, can activate a control valve in the intake system to limit engine RPM. When this system works, it shuts off intake air to slow down the engine when the system detects slippage in the rear wheels. If you have a toggle button on the dash to switch off the Traction control, turn the sytem off and try driving it and see if the noise goes away. Debris in the rear rotor "drum" brake could possibly blind a wheel sensor counting the revs and activate the Traction control
Idle speed control "motor" is a type of intake air control used to smooth out the engine. It operates in a air chamber and its the last thing I can think of that even remotely could make a noise.
Jun 23, 2011 |
2003 Ford F150 Regular Cab