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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

fuel pressure regulator

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Old October 14th, 2018, 5:04 PM
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Default fuel pressure regulator
My 2000 suburban 6.0 the fuel pressure regulator was just replaced with a Delphi it a make a buzzing noise that coming from the regulator. I pull the vacuum hose it stops This is the second regulator I try ed both the same noise.
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Old October 14th, 2018, 7:44 PM
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maybe check the fuel pressure. are the fuel trims readings high?
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Old October 14th, 2018, 8:25 PM
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Strange,put finger on vacuum line while running,is vacuum fluctuating?
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