Q: Issue with the fuel pump. Car died and won't start.

asked by on

So I drove my car around for 3 months and finally one day my car dies and won't start. I've had it diagnosed to the fuel pump and have replaced everything down to it... The relay, the sending unit and the pump 3 times n still nothing.. Why would my fuel pump not get power all grounds are working I have full power to the pump just won't turn on.. The check engine light was on before it died.
My car has an automatic transmission.

Hello, first task is to extract the problem codes which are setting the Check Engine Light on. This can make diagnosis and repair much faster and less expensive. I am confused by our comment that "have full power to the pump, but it won’t turn on", combined with "all grounds are working". Perhaps there is connectivity as tested by an ohm meter, but not good enough current capacity?

Check for voltage at the pump terminal when you are trying to start the car. It should be very close to 12 volts. If not, there is a current flow/connector corrosion issue. Also - the oil pressure switch is a safety switch for the fuel pump circuit - no oil pressure, no fuel pump operation. If this switch fails, the fuel pump does not run.

If you need help with this, I would recommend having the electrical issue diagnosed by a mobile, professional mechanic, such as one from YourMechanic, to inspect this problem, get an accurate assessment of damage and cost estimate for repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Issue with the fuel pump. Car died and won't start.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car shakes when I reach 60 mph

Shaking or vibrating may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal...

Q: Why when i go to crank up my car i have to press the gas

If you have to hold the gas open to start then you may have a throttle body and idle air control valve that has carbon deposits that need to be cleaned. The intake valves may also have carbon build up...

Q: Can it be the PPS sensor? or the app sensor?

Hi. First question to ask is if the Check Engine light is illuminated? If any portion of the electronic throttle malfunctions, it should automatically turn on the a warning light, and go into engine "limp mode" with limited power and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.