Skip the auto shop - Our mechanics make house calls

Q: Fuel pump shuts off and solution can't be found

asked by on

I have been struggling to figure out what is wrong with the fuel pump in my non-turbo car. On a cold-start, when I turn the key it will work, but after that the pump shuts off. I have checked the air flow meter, fuel pump relay #1 and #2, alternator output, oil pressure sensor. All of those are good, but the fuel pump still will not stay on. When I ran a hot wire from the battery to the fuel pump and bypassed everything, the pump did stay on and the car ran. Can you please tell me what is wrong with my car and what I can do to fix it?

A: Hi there, thank you for asking about your 1...

Hi there, thank you for asking about your 1983 Nissan 280ZX. You should replace the fuel pump relay. Make sure to hook up your multimeter to check for the voltage reading while you are trying to start the car and the fuel pump circuit should be live. Checking voltage without a load may show continuity, but not the ability to pass current. If you want to have this checked by a certified mechanic, a technician from YourMechanic can come to your home or office to replace your fuel pump relay.

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・Save up to 30%

Get a quote

What others are asking

Q: Overdrive stuck on OFF

Hello. The button itself might be damaged. Every switch and button accessible to the driver will have a way of being serviced. It's just a matter of what panels or access points you have to get into in order to...

Q: What other issues could I check, if I changed my coolant temperature sensor and my vehicle is still jumping or missing?

You need to fix that air leak. The best thing to do is buy a new intake boot. If you're short on funds, you can use duct tape or some other strong tape to cover the hole in lieu of...

Q: Car sputtering, rough idle 1983 Volvo 242

Hi there - the rough running you describe could be anything from bad gas (water content), failing ignition components, or a fuel system problem (low fuel pressure, clogged or leaking injectors,etc.). The first task is to extract problem codes from...

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...
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...
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.