Skip the auto shop - Our mechanics make house calls

Q: Car won't start after replacing fuel pump

asked by on

The car will not start after replacing the fuel pump.

A: Hi there. If the car was running fine prior...

Hi there. If the car was running fine prior to the pump being replaced, then you may have a defective pump. If the same problem was occurring before the fuel pump was replaced, then there may be a circuit problem. A mechanic would start by checking for voltage at the fuel pump to see if it is present. If it is, then the pump is the issue, if not, then there may be a problem in the fuel pump relay or an issue with the control module. The issue may not be fuel related either. It might be a bad crank position sensor, which is common on this vehicle. If this is something that you plan on having repaired, consider YourMechanic, as a certified mechanic can inspect the starting issue your vehicle is experiencing.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Starting problem

It sounds like somebody missed something. It could be that they didn't keep the car until it was cold enough to have a problem. Many electrical problems are temperature related because of the expansion and contraction of components going through...

Q: my brakes all of a sudden started making a grinding loud noise. the grinding continues while driving even brakes are not applied.

Hi there: Depending on what's causing the grinding noise; whether it's the brake pads grinding on the rotor, it's possible that the rotors and pads both need to be replaced. However, if the car is making a similar sound when...

Q: will a 98 chevy astrovan fuil pump fit my 90 gmc seirra 4x4 i think thay both have a 350

Different (non interchangeable) fuel pumps were used on the two vehicles that you are inquiring about. If you are looking for a used fuel pump for your 1990 Sierra, please simply search at Car-Part.com you will find an exact match...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.