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Ron, ASE Certified Technician
Category: Ford
Satisfied Customers: 23821
Experience:  23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
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I just replaced the fuel filter on my 2005 f150 and took the

Customer Question

I just replaced the fuel filter on my 2005 f150 and took the inertia switch out to let the pressure out of my fuel line. (Thats what it said to do in a video) and now when I put the negative terminal back on the battery, theres a ticking under the body, and the truck wont start
JA: Is the fuel filter an external one, or is it inside the tank?
Customer: external
JA: Are you fixing your F150 yourself? What have you tried so far?
Customer: Yeah I am fixing it myself. I have replaced the o2 sensors a day ago, and I just put on the new fuel filter
JA: Anything else you want the mechanic to know before I connect you?
Customer: Well I'm trying to diagnose my truck, because the idling is very rough, and will cut out when I let it sit idling. I think it may be a vacuum leak, or a fuel pump issue
Submitted: 9 months ago.
Category: Ford
Expert:  AMEDEE replied 9 months ago.

Hello and welcome!

My name isCustomerand I can assist you with your question.

Expert:  AMEDEE replied 9 months ago.

So does the engine crank over and not tart or does it not crank over at all?

Customer: replied 9 months ago.
Its not turning over now
Expert:  AMEDEE replied 9 months ago.

Ok, have you checked the battery? It might just be bad or low on a charge..

Customer: replied 9 months ago.
Why would taking the inertia switch out kill the battery? I'm just wondering
Expert:  AMEDEE replied 9 months ago.

It wouldn't.

It would most likely be a coincidence.