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What is the correct fuel pressure for a 2001 ford expedition 4.6L V8?

The correct fuel pressure for a 2001 Ford Expedition 4.6L V8 is 39-45 PSI (pounds per square inch) at idle. This is a *key pressure* and should be measured with a fuel pressure gauge directly connected to the fuel system. Remember that pressure can fluctuate slightly depending on engine speed and other factors. Always consult your vehicle's repair manual for the most accurate and up-to-date information.