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I am hearing a revving sound when reversing while aplying my brakes-car is Toyota Vitz 2008.

Tiny
LOVE1234
  • MEMBER
  • 2008 TOYOTA VITZ
  • 33,000 MILES
The car when stopped in traffic vibrates more than normal.

The car was put in park and brake pressed again to see what was going on and the revving sound in the engine was heard.

When I am driving I am not hearing this sound.
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Wednesday, April 18th, 2012 AT 9:02 PM

2 Replies

Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
I CANNOT FIND ANY INFO ON YOUR VEHICLE IN THE RESOURCES AVAILABLE TO ME.

IT SORTA SOUNDS LIKE YOUR BRAKE BOOSTER HAS A SPLIT/ CUT/ TEAR/ HOLE IN IT'S INTERNAL DIAPHRAGM. IT DOES NOT "OPEN UP" AND ALLOW AIR TO BE S. UCKED IN, UNTIL YOU PUSH ON THE PEDAL.

THIS AIR--WHICH SHOULD NOT BE ALLOWED TO ENTER, IS BASICALLY A VACUUM LEAK (THE SAME AS IF YOU SNATCHED A LIVE VACUUM LINE LOOSE ON THE ENGINE) THE "EXTRA AIR" WILL MAKE THE ENGINE REV

IF IT IS NOT A DEFECTIVE BRAKE BOOSTER (REPLACE, IF THAT'S THE CASE)--LOOK IN THE VICINITY OF PEDAL RELATED MOVEMENTS FOR A VACUUM LINE OR COMPONENT THAT MAY GET MOVED AND IS LOOSE OR CRACKED ALLOWING IT TO S. UCK IN AIR.

SORRY I'M NOT A LOT OF HELP

DO LET US KNOW HOW THINGS ARE GOING

THE MEDIC
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Wednesday, April 18th, 2012 AT 10:42 PM
Tiny
LOVE1234
  • MEMBER
  • 2 POSTS
Thanks, will check in to
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Thursday, April 19th, 2012 AT 5:17 PM

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