Skip the auto shop - Our mechanics make house calls

Q: No fuel pressure at all

asked by on

Car was sputtering at first like the injectors were clogging up then all of a sudden it seemed like had run out of gas. We checked for fuel pressure at the rail and there is none. But if we spray starting fluid into intake it will start up and run. We checked the fuel pump relay and it's good. It also sounds like the pump is priming.

My car has 240000 miles.
My car has an automatic transmission.

A: Thats a good question. You could be correct...

Thats a good question. You could be correct, however, lets go further back and make sure we can’t get your car fixed a little cheaper than going directly for the fuel pump. My first action would be to check the fuel filter. I believe yours is outside of your fuel tank so it’ll be a little easier for you. And if I’m not mistaken, it’s going to be about a 16mm wrench or 5/8". Take that off and see if it is clogged. I’m hoping this is your issue. If that is good, you can try your inline filter close to your firewall of the cab of your car under the hood. Give that a check and see if it is clogged. While you open these lines I must warn you to use safety glasses to prevent gasoline from getting in your eyes. Open the ends away from the tank. You’ll need to see what they are doing, and if there is free flow. If they are and you still have no pressure, then there may be a chance you need a fuel pump. But I would go ahead and have these other items checked before moving forward with a fuel pump replacement. If you need further help with this sputtering problem, a certified mechanic from YourMechanic can come to your car’s location to assist with this issue.

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: Power locks orthopedic seats

Both of these systems are controlled by fuse 'A' in the electrical center of your 1990 Mercedes-Benz 300E. If this fuse is blown it would prevent both the locking and orthopedic seats from functioning. I doubt it was related to...

Q: Renault Symbol has difficult start-up when it's cold

It's got a problem in the fuel injection system. It's going too high. So, the first thing you'd want to do is try my video "how to clean fuel injectors on your car." A lot of times, they get carbon...

Q: Car leaking gas

A fuel leak can be a very dangerous situation. Your car needs to be inspected and fixed as soon as possible. Fuel leaks can come from a cracked fuel tank or damage on any of the lines that run the...

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...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...