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

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: Fuel pump filter replacement cost

Hello. There are two fuel filters on your particular vehicle. One is mounted on the bottom of the fuel pump inside of the fuel tank and another one should be mounted on top of the fuel tank. The fuel filter...

Q: Emergency brake not working right

The parking brake is part of the rear brakes. If your brakes do not hold you on a hill, then the rear brakes are either worn-out, or in-need of an adjustment. I recommend that you have a mechanic, such as...

Q: Back air shocks drop, car too low warning

Hey there, thanks for writing in about your 2007 Mercedes-Benz E550. It sounds like you have covered almost all bases except for the possibility of a leak in the air spring itself. This is a common issue on these vehicles and...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
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.