All,

I am starting to hear a resonance noise inside the car but only at idle or when I come off the gas, it seems to be coming from the rear or center of the vehicle.

Could this be the FUEL pump? If so how long before it dies?

Help

2000 Chevy Camaro (http://www.2carpros.com/forum/2000-chevy-camaro-resonance-whine-noise-vt368431.html#) 6 cyl Two Wheel Drive Automatic 64000 miles.

This is a Resonance/whine noise that just started and it is most noticeable from inside the car. It is not coming from engine (http://www.2carpros.com/forum/2000-chevy-camaro-resonance-whine-noise-vt368431.html#) compartment. It sounds like it is in the carhttp://kona.kontera.com/javascript/lib/imgs/grey_loader.gif
(http://www.2carpros.com/forum/2000-chevy-camaro-resonance-whine-noise-vt368431.html#) either under dash, under the floor shift console or from the middle to rear of the car (http://www.2carpros.com/forum/2000-chevy-camaro-resonance-whine-noise-vt368431.html#).

The Car runs great, no stumble, no hesitation, starts all the time runs as it always has.

It happens a few minutes after I start it up and will sometimes will get louder/lower or go away for a few moments. Hot or cold, miles driven, it makes no difference. When the car is in gear and I accelerate it goes away but when I come off the gas at a stop light or in gear at idle in it is there.

When I place the car in neutral and rev the motor it does NOT go away.

I thought it was the fuel pump but when I rev the motor at idle it is still there. It seems only when in I am in gear under acceleration is when it goes away but when I come off the gas and stop at a light it is back.

Is there something on the transmission, vacuum leak?
Fuel pump; but only disappears in gear and under acceleration?

Can anyone help?

Sorry all,

Been busy so I did not post what was found.

The resonance noise was a heat shield around the catalytic converter, specifically the upper heat shield.

I was on a 400 mile trip when a rattle got so bad from under the car I went into a local repair shop 300 miles from home. What they thought was a catalytic converter lower heat shield vibrating turned out to be the upper heat shield.

This was discovered after they ripped the lower heat shield off.

The fix was to "metal" strap the upper heat shield to the converter because the upper shield is necessary to prevent the catalytic converter heat from coming into the the floor boards.

This stopped the resonance noise.

Strange things, resonance noises. Heat from the catalytic converter?

Now I will have to spend $400.00 to change the catalytic converter even though it is still good.

Does anyone know if a "new heat shield" can be done independently?