My 2001 Suzukigrand vatara v6 ddoubleoverhead cam is when gas pedal is pushed bogging down and making high pitch noise almost like it pulling vacume

check vacum pipes

You need to have the brakes inspected. This noise is the brake pad wear warning tab hitting the brake rotor.;

check throttle position sensor

Your noise sounds like it is power train related,If you have eliminated the engine,Since it doesn't make the noise while moving and in neutral.
It sounds like a universal joint in the drive shaft.Do you notice a vibration
along with the noise?

YOU CAN REMOVE THE SERPENTINE BELT AND START THE ENGINE BRIEFLY TO SEE IF NOISE IS STILL THERE. IF NOISE IS NOT PRESENT CHECK ALL BELT DRIVEN COMPONENTS FOR LOOSE BEARINGS OR EXCESSIVE MOVEMENT. IF NOISE IS STILL THERE THEN PULL DUST SHIELD UNDER VEHICLE AT FRONT OF TRANSMISSION. THIS WILL ALLOW YOU VISIBLE ACCESS TO THE STARTER DRIVE(THE PART THAT MOVES OUT TO ENGAGE THE FLYWHEEL ON BACK OF ENGINE)WITH AN ASSISTANTS HELP START THE VEHICLE(WEAR SAFETY GLASSES)AND WATCH AND LISTEN. IF THE NOISE IS IN AREA OF FLYWHEEL YOU WILL SEE THE STARTER DRIVE(IT HAS TEETH ON IT)STAYING ENGAGED TO THE FLYWHEEL, IF THIS HAPPENS YOU CAN TRY SHIMMING THE STARTER BUT MOST LIKELY THE STARTER WILL NEED TO BE REPLACED DUE TO A BAD STARTER DRIVE(OR BENDIX) RETURN SPRING. HOPE THIS INFORMATION HELPS!!

Sounds like a vacume leak, chk. for a cracked or broken vacume line or maybe one came off. Does it idle ruff? With it running open hood and listen for a low pitch whistle you may have to rev it up a little.

mass air flow censor

There may be a small hole or cut in a vacum line or possibly just loose. Also make sure the air filter box and the big hose to it are secure and clamps etc are tight. Pulleys and belts can make a high pitch sound also.

sounds like a typical throttle position sensor problem, ye before you get there check the air filter and make sure that youf fuel is not contaminated it is either your TPS or the air flow meter is going bad both are expensive sorry

I have the same problem and called Honda. One of their technicians said its related to transmission fluid and is considered normal, and there's nothing to fix. :(