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2000 2.4L Fuel Pressure Regulator

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Old 12-01-2013, 05:25 PM
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Default 2000 2.4L Fuel Pressure Regulator

The fuel pressure regulator on a 2000 Grand Am with 2.4L 4 developed a small fuel leak at the fuel pressure regulator located at the end of the fuel rail. I understand this is a common problem with these engines.

I replaced the regulator with a new one, but the engine now idles rough and hesitates off idle. I notice when I pull the vacuum hose off the top of the regulator, fuel flows out the top of the regulator at the vacuum line connection. I didn't expect to see fuel on the vacuum side of the diaphram. Am I correct in concluding my new pressure regulator is defective and fuel is being drawn into the vacuum line?
Old 12-01-2013, 05:38 PM
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You are correct, no fuel should ever come out of the vacuum side of the regulator. It'* bad. . . again.
Old 12-01-2013, 06:26 PM
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Okay. That will be regulator #4 on this car (that I know of).
Old 12-01-2013, 09:44 PM
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Maybe switch brand of part you are getting.
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