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When I start accelerating the engine it makes a loud noise like I am trying to rev the engine but I am just slowly accelerating at a normal speed. Looking for some ideas of where to start troubleshooting this issue. Thanks.
 

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Does everything look normal under the hood? Is the airbox lid still on, or are there any obviously loose connections? Did you have a recent trip to a quick lube shop...and they maybe forgot the air filter? Have you looked under the vehicle to see if someone stole your catalytic converter, or if you muffler fell off due to a large sink hole?
 

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At about 2000-2200 rpm the rusted heat shield or bracket would rattle/resonate against exhaust, doesn't matter what speed I'm going.
 

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If the problem goes away after the engine is warmed up it is probably the fan clutch. Some people replace them but you don't need to.
 

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