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

Customer Question

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
JA: Is the car in "Park" or "Neutral?" Do you know if your car has a "wheel lock" feature?
Customer: park
JA: Are you fixing your Mustang yourself? What have you tried so far?
Customer: yes fixing myself new fuel pump and fuel rail pressure sensor
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Ford
Expert:  david craig replied 1 month ago.

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

Customer: replied 1 month ago.
did that pressure ok
Expert:  david craig replied 1 month ago.

and the pressure was?

Expert:  david craig replied 1 month ago.

check engine light on?

Expert:  david craig replied 1 month ago.