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2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs

 
 
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Old Sun, December 14th, 2008, 07:23 PM
Mark_123 Mark_123 is offline
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Join Date: Nov 2008
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Default Fuel pump squeal....

OK, so I've never really had to turn my truck on and off and on without starting before getting my Gryphon. This may have been happening since I bought the truck, so I just wanted some opinions. When I turn my key to "on" without starting, I hear the fuel pump power up normally. When the pump stops (after just a second or two), it makes a squeal like sound as it stops. Is this normal??? Are there any particular readings I should monitor in my Gryphon (Fuel Rail Pressure) to be sure the pump is OK? Like I said, this may have been here since day 1, I just normally didn't turn my key to "on" and wait to listen for it. Thanks for any opinion.

Mark
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