Question about 1999 Pontiac Grand Am GT

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1999 grand am

My car is making a noise sounds kinda like a whistling noise when I give it gas

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Sounds like a vacuum leak, any rubber hose or even the intake boot could have a tear or crack in it. lightly spray carb cleaner over isolated places, if you hit the place where it is leaking, the engine will slightly rev up. try to narrow down your leak this way

Posted on Oct 03, 2009

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I have a 2004 pontiac grand am and it is making a whistle sound when I drive what is wrong?


It whistles because it does not know the words. Common experience tells us that whistling comes from sucking or blowing air or other gas, not a liquid, through an orifice. Lots of orifices on a car so start by having someone listen under the hood, after opening it, as it idles and even with some revving up and down a bit. Some clue may be given as to the location of the whistle.

If you look closely under the hood you will see many small diameter hoses, usually black, which transfer engine vacuum hither and yon to do work or throw switches as the car goes about its business. Following each of these hoses to their ends and making sure they are still connected could lead you to a whistler.

There is a large wide black belt under the hood called a serpentine belt, these have been known to screech as they age and/or become loose. If the whistle noise is actually a screech, then I think you could use a squirt gun to spray some water on it as it spins and if the noise briefly goes away until the water dries, you may cure your whistle with a new belt.

Someone who knows what they are doing is most likely going to have to put their eyes and hands on the car to figure this out.

Sep 14, 2011 | 2004 Pontiac Grand Am

1 Answer

Clutch makes whistle noise


Sounds like a throwout bearing is dry.

Jun 04, 2010 | 1998 Nissan Frontier

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High pitched whistle noise coming from engine


it sounds to me like it is a blower motor not the engine.(heater fan)

Dec 16, 2009 | 1999 Jeep Grand Cherokee

1 Answer

1993 Lincoln Continental v6 3.8L- whistling noise under the hood


if it's not running bad, it may be a simple crack in a pcv line, or a loose hose(vaccum). should be simple to fix.

Aug 29, 2009 | 1994 Lincoln Town Car

1 Answer

Whistling can not find any vacuum leaks if you accelerate the whistling goes away


Sounds silly, but you can easily trace the source of the noise by taking a short piece of garden or heater hose, putting one end to your ear and using the opposite end as a probe. It works like a directional microphone and will lead you right to the noise source!! At higher rpm's the noise likely does not go away, but becomes hypersonic and beyond your hearing range.

Jul 26, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Whistling Jeep grand cherokee 1999


Sounds like a vacuum leak. Check that all your vacuum lines are attached and in good condition.

Jan 03, 2009 | 1999 Jeep Cherokee

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My 1994 Jeep Grand Cherokee is making a whistling sound. It whistles when I am giving it gas even coasting. But when I slow down, it stops or gets quieter. We changed the PCV valves and hoses for the...


Often a whistling sound, from the engine bay anyway, is the sign of a vacuum line that is leaking. Might want to check all the vacuum lines for cracks and such and make sure they are all connected.

Dec 31, 2008 | 1999 Jeep Grand Cherokee

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