Skip the auto shop - Our mechanics make house calls

Q: Vehicle will sometimes turn over, but not start

asked by on

Sometimes my vehicle will turn over, but it won’t start. The crank sensor was replaced and a local import repair shop reported that they think it to be the main computer because the fuel pump is getting too much. Randomly the vehicle will start over and over, but other times it only turns and won’t start. Can you tell me what could be causing this?

A: Based on your description, it sounds like y...

Based on your description, it sounds like your fuel pump may be randomly shutting off. This can be due to a malfunctioning powertrain control module as the repair shop told you. This can also be related to a faulty fuel pump, loose wire, faulty fuel pump relay, faulty ignition switch, or a clogged fuel filter.

I would recommend having your fuel pumps electrical circuit inspected for damages and tested with a digital multimeter in various locations to determine if the circuit is performing its intended purpose. If any damaged wires are located, they should be replaced immediately as this can cause the symptoms you are having. It is also very important to check near the power distribution center under your hood for the fuel pump relay and see if any damages are found there as well. If you want to have this done, a certified technician from YourMechanic can come to your home or office to diagnose your starting issue and let you know what needs repair.

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: Check Engine light on. Would the computer give all error codes in one shot? How do we know the engine's condition?

Hi there. From the description you have provided, I'm am inclined to agree with your assessment of a used engine being installed in your vehicle. An inspection of the engine, by a qualified technician could determine whether the engine is...

Q: I have a Mercedes GL450 with 13000 miles that was due for a B1 service. The dealership charged $750. Is this normal for a Mercedes

Hello. This is a normal charge from the dealer. Though they do a good job on the vehicle they will be quite a bit higher than independent technicians. If you want to have this done outside of the dealer next...

Q: Driving down the road, the transmission stop pulling. Has code p0720. What sensor needs changing?

In the future, please include the model of Nissan and the motor size. This way we can be more certain we are giving you an accurate answer. The P0420 code has to do with the catalytic converter. It will...

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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.