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: Does my vehicle have an oil pressure sender or oil pressure sensor or both and where is it located?

Your motor (454/7.4L Big Block Chevy) should have an oil pressure sending unit that is typically mounted just above the oil filter housing. This is a relatively small unit (about the diameter or a quarter or slightly bigger) with threads...

Q: I have a 2002 Buick Century and my "service vehicle soon" light is on along with the "anti lock" light and the "Trac off" light.

Hi Eric. Thanks for contacting us today. Unfortunately, it's not possible to correctly diagnose the root source of your warning lights remotely. The lights you've indicated - the ABS and Trac Off light are monitored and triggered by multiple vehicle...

Q: Q: Car cutting off

I would not think an O2 sensor would cause a stall and no or hard restart. I would think you have a problem with a fuel pump or pump power supply problem. This could cause O2 sensor codes if vehicle...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.