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fuel pump driver module whst does it do

fuel pump driver module whst does it do
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Answered in 18 minutes by:
7/15/2010
Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 36,873
Experience: 23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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Ron :

Hello,

The Fuel Pump Driver Module communicates diagnostic information to the powertrain control module (PCM) through the Fuel Pump Monitor (FPM) circuit. This information is sent by the FPDM as a duty cycle signal which in turns controls the fuel pump.

Customer:

My ford cranks fine, I've replaced all wires, plugs, coil, fule has been refreshed. I was told it sounds like the fule module and it keeps it from starting until pressure builds up. Beacuse if I keep trying it will start after a loooong time but then runs ok

Ron :

Yes a bad driver modual could cause this problem by no allowing the fuel pump to run. That being said, a week fuel pump will do this as well. I would start checking fuel pressure when its hard to start.

Customer:

how's the best easiest way to test fuel pressure, I will replace the module tomorrow and see if theres a change

Ron :

Install a fuel pressure guage to the fuel rail service port.

Ron
Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 36,873
Experience: 23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
Verified
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Experience: 23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

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