Thread: Fuel Pressure Fluctuation
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Old 05-29-2003, 04:47 AM
cobra427mnsi cobra427mnsi is offline
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jmille

Try removing the gas cap, while the engine is running, to see if that affects the pressure guage. If you are getting a vacuum in the tank from a plugged (or non existing) vent, removing the gas cap will prove it. If there is no change, follow the other suggestions given.

Paul
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