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Fuel Pump Noise


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It's was a really hot day here In Vegas today ,and I noticed that I could hear my fuel pump run from inside the cab once the truck was running after a while , but the noise isnt as loud when cold. my question is , is it Normal or should I be worried ?

Also it's a 1987 4.0 5speed and the engine was running at 200~210*

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I can hear mine in my '90, and I'm damned near deaf. But I only hear it sitting still at idle, just a soft hum-m-m.....any movement and road noise drowns it out. I can also hear it from outside the truck when I walk past the gas tank on my way to close my gate. Been like that as long as I can remember, and never missed a beat during that time. 

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