How to Properly Test and Diagnose a Bad Fuel Pump

In this video I show you how you can test and diagnose a bad or failed fuel pump on your car. A bad fuel pump can cause a Crank No Start condition and its very important you know exactly and correctly how to diagnose a failure of the pump. Otherwise you a misdiagnosis will cause you to mistake a bad fuel pump for a wiring or ignition issue and send you in the wrong direction.

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Disclaimer:
Due to factors beyond the control of Ratchetsand Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchetsand Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchetsand Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchetsand Wrenches.

[sonny]

This might be the best tutorial I have seen on YT. Truly excellent.

[mrbigxd]

This is one of the best videos I've seen for troubleshooting the fuel pump and the pressure not everybody can afford all the pressure test and not every car comes with a tester valve

[dawgrules]

Good video - remember, the fuel pump will not continue to run with key ON and engine not running without a jumper in place. It's a safety feature so grandma will not burn up after she causes a 20 car pipe-up and does not turn key to OFF position when she is done.

[EverHp]

Simply excellent fuel pump diagnosis video. Much appreciated.

[ericwillis]

very good video, everyone should should follow your video format, you cut right to the point, very informative. you can see everything clearly, this video is very professional. thank you

[Carlostype]

Nice one! and my cheap obd2 reader connected to the torque pro app will give you fuel pressure values at the rail, well it does on mine, for quick direction👍

[eliasrobinson]

Thank you for sharing that info with us because my belt did break and the tow truck was to expensive wish all of you the best

[emilepapillon]

Thanks!! I've 12.75 volts at the pump, 4 amps going through, 20 PSI of pressure (supposed to be 70 PSI), no start. So what I take away from your video is I have to keep looking (fuel pump is NOT my issue here).

[danielwood]

Great!!!!  Very informative!!!!   Thanks so much for sharing your

[hcooper]

Thank you I lorned a lot from you.
I fix my ac too because you tichme.
Thank you again.

[larrybenedict]

Great video quick and specific thank you

[hankbridges]

A code tester can operate the pump and give codes if it don't work. If you get codes about fuel pump circuit, it could be the relay if the pump don't work. Try the solenoid and relay test. Fuel pumps can operate intermittently. A partially clogged tank filter can cause low fuel pressure. If the pressure leaks down, it could be the pump, injector, or pressure regulator. The live test on a code tester can show fuel pump pressure while cruising at highway speeds to see if it's low.

[TommyVercettiCB]

Got a 99 Camry. Haven’t started in 3 weeks during this pandemic. Went to start it i turned over then died instantly and all it does is crank. Fingers crossed it’s only just the fuel pump/ relay and timing belt didn’t slip.

[SouthMainAuto]

Good job sir, don't forget the hammer on the bottom of the tank test :) haha

[skallica]

Qué onda viejon? Espero y tengas 1 millón subscribers

[wyattspop]

Good Day,

I’m a stay-at-home Dad on disability (got run down by a
Postal Truck on my motorcycle) and I was hoping you could advise me. My 1996
Oldsmobile Aurora
won’t start and it’s definitely fuel-related. It turns over fine, but it “coughs”
when I pump the accelerator. The fuel pump is NOT engaging when I turn the
ignition to on (I would normally hear it), but I want to be sure it’s not a
clogged fuel filter, open fuse or a relay etc. before spending hundreds I can
ill-afford on a pump I don’t need. This began when I accidentally ran out of
gas last week, my fuel gauge was not working. I’m betting sediment from the
tank got sucked into the lines, fuel filter or injectors. My car has been
running fine until I tried to start it yesterday. I assumed I ran out of gas,
got 2 gallons in a can but it still won’t run. How can I eliminate the other
things to find it is a bad pump?

Thank you so much

[ikennaq]

thanks for wonderful information brother.

[marthairenecabreragarcia]

Can you help me with a Chrysler Pacifica 2005 fuel pump problems?

[robertjahrling]

I have watched a few of your videos

And by your voice
I really thought you would be a little more
CHUNKIER LOL

[johnferrante]

If I disconnect the fuel line at the rail, and after taking precautions, crank the engine, shouldn't I see fuel coming out of the line?  Would this indicate a good or bad pump?  Thanks for your video!