Question about 1998 Pontiac Bonneville

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My bonneville keep maaking an funnt noise when i pick up speed

It sound like something is rattleing

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My 89 lincoln made the same noise, the catylatic converter was falling apart inside.

Posted on Feb 20, 2009

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2 Answers

Rattle noise coming from under pick up bed at high speed


Since it should be under factory warranty I would expect you to take it to the dealer for inspection.
My first guess would be something in the exhaust or the suspension.

Aug 30, 2012 | 2012 Chevrolet Silverado 2500HD Work Truck...

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When I first start my truck I can hear a loud rattling sound coming from the back. Hear this sound also when I am in idle. Don't notice it when I pick up speed.


Check to see if one of your brackets holding the exhaust pipe has come loose. That'll make a rattling sound - especially if it towards the end by the tailpipe. When you're accelerating - more air is forced thru your exhaust at a faster rate, so it's not moving as much as when you're sitting still and the truck is just at an idle with less air/exhaust moving thru the tailpipe. If it's only making the noise while the truck is stationary & the noise stops one the truck is moving - that pretty much rules out anything to do withe the drive-train or suspension. You are sure the noise is from the back & not coming from under the hood? If under the hood - check your oil level ASAP.

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1 Answer

1992 Bonneville SSEI 3.8 supercharger making internal noise


IF YOU HEAR RATTLING NOISE IN SUPER CHARGER.YOU HAVE WORN DRIVE MECHANISM LIKE LOOSE ROTOR SHAFTS OR WORN ROTOR SHAFT BEARINGS.

Aug 26, 2009 | 1992 Pontiac Bonneville

1 Answer

1994 Corolla rattles when idling and at low speeds.


It amazes me that they didn't at least address the rattling noise, seeing how they probably caused it. If it is just a belt, that's an easy fix. Did you stop at another shop & ask for a quick diagnosis?
Could be something as simple as a heat shield , or something. Doesn't hurt to have a second opinion, and shouldn't cost anything, or very little, then go back & tell them what the diagnosis was.

Jul 24, 2009 | 1998 Toyota Corolla

3 Answers

Rattle when accelerating


had the same issue, had someone look and it seems the noise was caused by heat shield being loose covering exhaust system. Have that checked out.

Jan 15, 2009 | 2005 Nissan Pathfinder

1 Answer

1992 bonneville transmisson won't engage


not likely possibly the cover for torque converter may be loose. if rattling coming from pass. side may be belt tensioner/or water pump. to check shut engine off remove serp. belt check water pump pulley for play by wiggling back an forth do same with belt tensioner. check trans fluid level while on level surface engine warm&running tranny in park. some gm cars have had problems with crank shaft pulleys making rattling noise also.

Oct 03, 2008 | 1992 Pontiac Bonneville

1 Answer

'98 Civix LX- front end metal rattling noise


sounds to me like the heat sheild on the exhaust!! simple enought to fix!!! no harm to get car serviced while your at it to

Aug 19, 2008 | 1998 Honda Civic

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