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Ask A. Penland Your Own Question
A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Ford
Satisfied Customers: 6628
Experience:  ASE Master Certified, ASE Advanced Gasoline Engine Performance
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Would a malfunctioning EEC relay cause the 4.9L engine in a

Customer Question

Would a malfunctioning EEC relay cause the 4.9L engine in a 1994 Ford F-150 to cut off?
Submitted: 1 year ago.
Category: Ford
Expert:  A. Penland replied 1 year ago.

Yes it will. If it opens, it will stop power to the fuel pump and the PCM (Engine Computer).

Customer: replied 1 year ago.
Fuel pump continues to run after engine shuts off.
Expert:  A. Penland replied 1 year ago.

Then the EEC relay is not the problem.

Is the check engine light on when it stalls?
What else have you had replaced to fix this problem?