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This is a possible cause: Halfway through the exhaust system you have a "catalytic converter". The converter has a heat shield over it. It's just a piece of thin metal that is not absolutely necessary to the operation of your vehicle. They usually rust out where they are connected to the converter. Then when you accelerate, it rattles like a piece of light metal hitting heavier metal. You can spend a lot to have the shield replaced (Waste of money)or you just crawl under the vehicle and bend the shield back and forth until it breaks off. Even most mechanics do this. The whole purpose of the shield is to try and deflect some of the heat from the converter...ie...when you drive into a pile of leaves or really tall grass, the converter won't ignite the leaves.(converters get very hot) The shields are pretty useless and I think they were designed to make us crazy once they get rusty!! Hope this helps!

AnswerThe above answer sounds right, but on my 97 explorer V8 the same rattling ocurrs when accelrating, especcialy when the engine is cold,due to a faulty exuast flange coming off the engine`s right manifold.this part can be seen by looking behind and near the top of the right front tire.To verify if this is the problem,start the truck when the engine is cold,and the hood open,and the truck in park,have someone step on the accelerator while you lisen to the engine, if the rattling sounds like its its coming from the right side of the engine , that's the problem.
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โˆ™ 2011-09-13 17:53:50
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Q: What would cause a rattling noise when you accelerate on a 1997 Ford Explorer?
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