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05 mustang 4.0 just replace fuel pump and fuel rail pressure…

Customer Question
05 mustang 4.0 just...

05 mustang 4.0 just replace fuel pump and fuel rail pressure sensor sometimes still hard to start I turn key to on wait 10 seconds for pressure to build up let it crank for 5 to 10 seconds no start, turn off start again and it starts right up after i drive awhile go to start sometimes it fires up right away and sometimes crank it stop and start and fires up

Mechanic's Assistant: Is the car in "Park" or "Neutral?" Do you know if your car has a "wheel lock" feature?

Park

Mechanic's Assistant: Are you fixing your Mustang yourself? What have you tried so far?

Yes fixing myself new fuel pump and fuel rail pressure sensor

Submitted: 11 months ago.Category: Ford
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Answered in 2 minutes by:
9/7/2017
Ford Mechanic: David Craig, Auto Mechanic replied 11 months ago
David Craig
David Craig, Auto Mechanic
Category: Ford
Satisfied Customers: 6,006
Experience: owner/mechanic at 3D Automotive
Verified

Hi Im David, thanks for visiting the site. You need to check fuel pressure, key on. engine off.

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Customer reply replied 11 months ago
did that pressure ok
Ford Mechanic: David Craig, Auto Mechanic replied 11 months ago

and the pressure was?

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Ford Mechanic: David Craig, Auto Mechanic replied 11 months ago

check engine light on?

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Ford Mechanic: David Craig, Auto Mechanic replied 11 months ago

TSB

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