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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Ford
Satisfied Customers: 3016
Experience:  Owner at Carolina Auto Service & Sales , 20 years experience in Foreign & Domestic Vehicles
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Intermittent fuel loss - looking for the fuel pump control

Customer Question

intermittent fuel loss - looking for the fuel pump control circuit diagram
JA: Have you ever replaced the fuel pump, or is this the original?
Customer: original
JA: What is the model/year of your Ford?
Customer: 2004 expoy
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: filter replacement. Hearing/reading about pump driver module corrosion issues creating symptoms like I have
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 6 months ago.
Category: Ford
Expert:  Chad Farhat replied 6 months ago.

Hi, I'm Chad. Welcome to JustAnswer. I'm reviewing your question and I will be posting your reply ASAP.

Expert:  Chad Farhat replied 6 months ago.

hey how are you I will be right back , can you tell me what engine size you have in it ,so i can be accurate on the circuit diagram for you

Customer: replied 6 months ago.
4.6L. Issue is intermittent hard or no start. Normally after the vehicle has been driven for a while, shut off, then restarted soon thereafter (15-30 minutes).
Expert:  Chad Farhat replied 6 months ago.

This the fuel pump circuit diagram as requested & connector plug pin out

and also sent you fuel pump relay and circuit for it

1- unplug the fuel pump module connector and inspect for broke pins or baked out pins making poor connection ,spray electrcail contact cleaner on the connectio and retry

2- with switch on do you have power on the fuel pump

3- was the fuel pump relay checked

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Expert:  Chad Farhat replied 6 months ago.

this waiting time and start back up , that is 90% of time fuel pump when it is hot it shuts off ,when cool back down it wil run again .

but make sure the relay is not getting stuck

Please let me know

Thank You

Chad Farhat

ASE Certified Technician

Customer: replied 6 months ago.
Thanks. Have an appointment with the DR. soon - will be back in touch.
Expert:  Chad Farhat replied 6 months ago.

ok sounds good

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Thank You
Chad Farhat
ASE Certified Technician