Re: 2000 95 fuel pump. - Saab 9-5 Bulletin Board - Saabnet.com
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Re: 2000 95 fuel pump.
Posted by Allan (more from Allan) on Sun, 9 Nov 2008 18:18:30
In Reply to: Re: 2000 95 fuel pump., GAB, Sun, 9 Nov 2008 13:42:32
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The pump ordinarily runs for a few seconds to pressurize the system but i'm unfamiliar with whether there's some closed loop control that manages it or if it's just timed to run when the key switches on. However, the fact that you're getting voltage to it would be enough for me to look at other parts of the system. First place to check is whether there's fuel pressure at the fuel rail.
Just attach a pressure gauge to the shrader valve on the fuel rail and see what the resting pressure is and what it goes to when you turn the key to on. If there's no pressure, or the pressure is low before and after turning the key to on, then the pump is most likely bad.
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