Mechanics

I AM HEARING A REVVING SOUND WHEN REVERSING WHILE APLYING MY BRAKES-CAR IS .

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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Love1234
April 18, 2012.




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

CJ MEDEVAC
Apr 18, 2012.
Thanks, will check in to
AD

Tiny
Love1234
Apr 19, 2012.

AD