Skip the auto shop - Our mechanics make house calls

Q: Fuel pump is not coming on when try to start the vehicle.

asked by on

My fuel pump is not coming on when I try to start my vehicle. I can jump the relay and the pump will run. I replaced the relay and the fuse but it still did not fix the problem. Any idea of what could be the problem? Could it possibly be a bad ecm? Also, when I do jump the relay to make the pump run, I do not get any fuel pressure to the fuel rail. This is a new fuel pump that I just bought and changed because the old fuel pump had a leak.

My car has 144000 miles.
My car has an automatic transmission.

Hello there, thank you for asking about your 2007 Chevrolet Cobalt. If you jump the fuel pump relay and still do not get fuel pressure, then you may have wired the fuel pump in backwards. The pump may be running backwards and not sucking in fuel. You need to make sure you installed the pump wiring correctly. If you need help from a certified mechanic, you can have your fuel pump installed by a technician from YourMechanic at your home or office.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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. Fuel pump is not coming on when try to start the vehicle.

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: Ran out of gas, now car won't start. I don't think I hear the fuel pump.

As you may know, in to day's modern vehicles the fuel pump tends to get fairly hot when running and is actually cooled by the gasoline circulating through it. When the fuel tank is run completely empty resulting in the...

Q: i don't know when the last time the transmission fluid was changed

Minor and intermittent transmission issues can be related to a lack of fluid maintenence. Major issues would not be the case. I think you have a fairly minor issue. Considering that the transmission fluid is a basic maintenence item that...

Q: Air conditioner

It sounds like you may have a faulty blower motor or blower motor relay. Occasionally, the blower motor itself will wear out or become faulty working intermittently as the brush contacts inside the motor wear out. The blower motor relay...

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 Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...