Question about 1999 Pontiac Grand Am GT

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99 grand am as i accelerate makes a loud noise not by timing belt but near the throttle area similar to sound of hole in muffler

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The intake manifold is a problem on those cars.

Posted on Sep 06, 2009

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1 Answer

2005 Cadillac CTS is making loud noise, sounds like it's coming from underneath the car.


-Muffler pipe connector could be loose.
-Could be a "hole"
And depend on how many part need to replace or just tight down.
-It could run from 150-400 (If replace the whole muffler line, it'll
go up to 800)

Mai

Apr 03, 2013 | 2005 Cadillac CTS

1 Answer

When i accelerate it sounds like a hole in my muffler, but when I maintain a constant speed it goes away, what can it be?


It could be a small hole or the baffles are loose in the muffler itself.You can either check this out yourself by jacking the vehicle up and starting it and see where the noise is coming from or have it looked at at a repair shop.Make sure they show you the problem if they find one.Don`t just take they`er word.Hope this helps.Good luck.

Feb 17, 2012 | 2007 Chevrolet HHR Panel LT New Cars

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I can feel friction while driving above 15 mph.


If you have a bad wheel bearing then you will have a vibration that you will notice. If that is the case then you have a bad wheel bearing.

If you had a hole in your muffler it would be loud all the time and be even louder upon acceleration. You could check this first by getting under your car while its running and see if exhaust is coming out where it shouldn't be.

Subikid90

Mar 03, 2010 | 1998 Buick Regal

2 Answers

Muffler continues to blow a hole in it making my jeep become really loud this is the third muffler


If you live near, on or continuously drive on uneven terrain then you might be scraping somewhere over time creating a hole or improper installation.

Feb 01, 2010 | 1999 Jeep Grand Cherokee

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There is a loud "howling" type noise similar to blowing in the top of a bottle heard in the area of the throttle body/idle control module.The dealer replace the aftermarket air filter with a Honda filter...


It sounds like it is probably a vacuum leak. Have them do a smoke test with the vehicle off to check for a faulty gasket/hole in a hose somewhere.

Good luck

May 06, 2009 | 2004 Honda Accord

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Loud roaring noise


jack up front of car get hold of tyre an see if u get any play if u do u may get away with nipping them up a bit

Nov 19, 2008 | 1999 Mitsubishi Galant

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Loud ticking/knocking/rattling sound when I start/accelerate


hi is it miss-firing as it sounds like a knocking noise can be anything but if you can feel it on the accelerater pedal then the noise sounds like its on the inlet valve side which would transfere the noise up the throttle body where the accelerater is located it could be something as simple as a tappet come loose to a burned valve you need to have a look do a compression test and take the rocker cover off see if theres anything come loose yates210456

Oct 13, 2008 | 2000 Dodge Grand Caravan

1 Answer

Rear acceleration noise


Try rear wheel bearings. The cause a roaring noise that increases with acceleration. Sounds very similar to loud road noise.

Jul 09, 2008 | 2000 Subaru Impreza

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