Skip the auto shop - Our mechanics make house calls

Q: Truck turns over but won't start.

asked by on

Truck was running rough, changed fuel filter and fuel pump, now truck won't start
My car has an automatic transmission.

If the fuel pump that was installed is not pumping then it would need to be checked by hooking up a fuel pressure tester to the fuel rail. If there is no fuel pressure, then check if the fuel pump is getting power to the connector of the pump. Specifically on the pink wire in the fuel pump connector. If there is power then you got a defective pump.

If you have no power, then check the fuel relay by swapping it with another relay in the main fuse box in the engine compartment. Also, check fuse number 27 for burn or brown marks and install the fuse kit to remove it from the fuse box if it is damaged. If you decide that you need help with these checks, feel free to contact a mobile mechanic who can come to the location of the vehicle and diagnose your starting issue firsthand.

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: Back doors not opening

If the locks do not operate for the back doors, I would suspect a blown fuse. Otherwise, the master switch in the driver's door may have to be replaced. A diagnostic is required to determine the exact issue with your...

Q: When I turn my signal lights on. Why does my brake light goes out? I move it up and down they come back on. What can cause that?

Hi there. You may have something broken or worn inside the turn signal switch. I recommend replacing the turn signal switch. There also could be a loose ground near the brake lights that could be causing the lights to shut...

Q: Car runs rough

The typical cause for many vehicles to start running rough is an out of tune ignition system. spark plugs are wear items that need to be maintained. The spark plugs receive the ignition spark from the coil pack which is...

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...
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.