2003 buick century no power to fuel pump. Cranks no start
10

Asked by Azcanyoneer Dec 03, 2019 at 08:42 PM about the 2003 Buick Century Custom Sedan FWD

Question type: Maintenance & Repair

I have a 2003 Buick century that was running fine. Parked in front of the house and wouldn't start later.  I have no power to fuel pump relay.  I have already tested every fuse and relay I could find.  I was able to jump the relay and get the car to start and run.  Could this be a security device issue? Any help would be appreciated

2 Answers
140

Jon answered 4 years ago

Security system on a 2003 Buick Century? LOL. How is the alternator have you checked it lately? Do the lights flicker when you try to start it? Start there.

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10

Azcanyoneer answered 4 years ago

Jon, Security system....um yes, it has a resister in the ignition key. These will normally keep the engine from cranking over if damaged or absent, I've had to bypass some to get a car to start but I have never had one stop a relay for the fuel pump before. I read in other threads that this could be a possible cause but never saw a resolution. As to your alternator suggestion, if the battery is fully charged, what would the alternator do to keep the computer from sending a signal to the fuel pump relay on start?

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