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A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Mercury
Satisfied Customers: 6597
Experience:  ASE Master Certified. ASE Gasoline Engine Performance Certified,Ford Senior Master Technician
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Mercury,grand marquis gs: ,97grand Marquis died on the highway.replaced

Customer Question

Hi,97grand Marquis died on the highway.replaced shorted inertia switch all good till car sat for 18 hours.dead.under warranty replaced alternator and battery,again same.,dead
Submitted: 2 years ago.
Category: Mercury
Expert:  A. Penland replied 2 years ago.
Hello and thanks for using JustAnswer.I will try my best to help you with your question.
Did the engine crank over with the starter or not at all?
Customer: replied 2 years ago.
After it died on highway yes
Customer: replied 2 years ago.
(Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Expert:  A. Penland replied 2 years ago.
Which one, not cranking or it did crank over?
Customer: replied 2 years ago.
Customer: replied 2 years ago.
Yes it crank over
Customer: replied 2 years ago.
Call(###) ###-####
Expert:  A. Penland replied 2 years ago.
I cannot call because I only have a company phone, no landline at home.
I'm a little confused. You stated they replaced a shorted inertia switch, but when did they replace the alternator and battery?
The problem sounds like the fuel pump is going bad.