You can also check for fuel pressure by pressing in on the Shrader valve on the fuel rail. If you put 12 volts directly to the pump and it won't turn on, then you either have a bad fuel pump or a bad ground circuit.
Water Ram Pump 2
Completing the hydraulic water ram pump rebuild.
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How To Tell If Your Fuel Pump Is Bad
Scotty Kilmer, mechanic for the last 46 years, shows how to find out if
your car's fuel pump has gone bad. Some simple tests are all that's needed,
and you don't want to guess with a new pump without testing, as some can
cost over a thousand dollars to replace. And, If you like my car help, be
sure to watch my live car talk show every Saturday morning at 10 AM CST on
YouTube. I answer your car questions LIVE there. Just check it out at
eature=c4-overview . And remember, every TUESDAY I upload a new video, so
don't miss them.
How To Diagnose A Fuel Pump Failure - EricTheCarGuy
I had the privilege of visiting Airtex, and while I was there I spoke with
Shane Neuman about diagnosing a faulty fuel pump. In this video we go over
the basic steps of diagnosing a faulty fuel pump. So if your vehicle isn't
starting and you suspect a fuel pump problem, here are some steps to follow
to confirm your suspicions. Another 'quick' test is to bang on the fuel
tank and then try and start the engine. Sometimes this works, just don't
bang too hard, you could damage something.
Airtex diagnosis webpage:
Here's a link to an article I wrote on diagnosing No Starts that you might
also find useful:
The best place for answers to your automotive questions:
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or injury incurred as a result of any of the information contained in this
video. EricTheCarGuy recommends safe practices when working with power
tools, automotive lifts, lifting tools, jack stands, electrical equipment,
blunt instruments, chemicals, lubricants, or any other tools or equipment
seen or implied in this video. Due to factors beyond the control of
EricTheCarGuy, no information contained in this video shall create any
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injury, damage or loss that may result from improper use of these tools,
equipment, or the information contained in this video is the sole
responsibility of the user and not EricTheCarGuy.
GM Fuel Pump Relay Testing
For more on fuel pressure testing, go to my website at
1999 Chevy Suburban with no fuel pressure. The following is covered in this
1. How to test a fuel pump relay in a power distribution box.
2. Power side switched circuit design description and operation.
3. Bias voltage on an output. How and why is it used.
4. Fuel pump power and ground testing.
5. How to manually jump a fuel pump from the fuse box
6. How to measure fuel pump current flow.