Asked by Oct 02, 2016 at 12:02 PM about the 2001 Mercury Grand Marquis GS

Question type: Maintenance & Repair

*Help*: my 2001 mgm has a
starting issue. It left me stranded...
put in a new fuel pump, new fuel
filter but wouldn't start. Had it
towed to ford dealership where
they replaced the computer. They
said it went bad and went into
security mode? Now it is taking a
while for the fuel system to build
pressure? I have to wait until I hear
the fuel pump turn off before the
engine will start. Takes anywhere
from 20 seconds to 1 minute?
Please help, Thanks!

1 Answer


Sounds like the check valve in the fuel system is bad and is allowing the gasoline to drain back into the tank when you shut off the engine. Some vehicles have the check valve incorporated into the fuel pump module while others have a separate, inline, check valve. HTH. -Jim

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