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Fuel Pressure Regulator


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I just removed the fuel pressure regulator from my 02 4.3V6 Sierra. It was hard to start several times, but had spark. I'm hoping its the regulatorinstead of the fuel pump. I hqave it removed now, but am wondering if there is a way to test the regulator outside the truck? Its the 4.3, so there was no vacuum line attached so i could not tell if there was any fuel comng out of the vacuum port.

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