How To Diagnose A Fuel Pump Failure

http://www.ericthecarguy.com/

Airtex diagnosis webpage

http://www.airtexproducts.com/techresources1.html

I had the privilege of visiting Airtex and while I was there I spoke with Shane Neuman about diagnosing a faulty fuel pump, here is the result, Hope the information is helpful.

Stay dirty

ETCG

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Category:

Autos & Vehicles

Tags:

• fuel pump
• fuel pump fail
• no fuel
• no fuel pressure
• no fuel psi
• fuel psi
• bad fuel pump
• finding a bad fuel pump
• no start
• diagnosing a no start
• no start diagnosis
• no start fix
• airtex
• airtex fuel pump
• airtex fuel pumps
• automotive education
• how to auto repair
• how to truck repair
• how to diagnosis
• eric the car guy
• ericthecarguy
• etcg

[glacial5584]

And to add when i replaced the fuel filter it was pretty clogged which is leading me to believe that is what burnt the ecu and maybe the pump, but i had a tbi chevy kick me around for a week until i found a short in the harness for ignition module.

[EricTheCarGuy]

@glacial5584 You might try posting your question over at my forum on my website.

[glacial5584]

Im looking at dropping the tank on a 2001 Astro van, ecu fuse was blown, i replaced it and still nothing the relay is not switching so i swapped it out nothing changed. I would check oil pressure sending unit but the book says the motor has to be running. anyhow if i missed something please inform me it would be much appreciated!

[EricTheCarGuy]

@glacial5584 Honestly I don't know, you may have an electrical issue causing the problem but without looking at the vehicle for myself it's hard to say what the problem is.

[MrMusicDreamz]

I think you guys are quite helpful! There might be one item you did not mention that I know has an impact on your test. That being the collision fuel shutoff switch which I know on one of my vehicles is in the floor of passenger side or in front of the door there. With that switch, which acts just like a fuse, you can reset it by just pushing the button. Could you possibly do a video on the fuel pressure regulator for an astro van? I have to use starter fluid on cold starts often. great job!

[EricTheCarGuy]

@MrMusicDreamz Good point, thanks for pointing that out.

[darmikela]

HAHAHAHA. You can a Chevy's fuel pump from an fucking mile away!! No need to do that step.

[smithraymond09029]

@smithraymond09029 Sorry, meant to say "start" key position.

[smithraymond09029]

The "listen to the pump" test does not work on some Lexus models since the pump does not actually run until the starter is engaged (run position). At the end of the day, a fuel pressure test tells the story.

[SuperWhoopass]

Hey Eric? I gotta ask. Is the sound of the car running in your intro taken from Steve McQueen's '68 Mustang fastback? It sure sounds like it did in Bullitt...

[chppper67]

Thanks.

[alldayandnight09]

OMG ericthecarguy you for fuel level! Also on fords check the inertia switch which may have triggered for some reason or another. Anyway Great video keep this up!!!!!

[fl0r1svdk]

the first thing to look ad is the fuel level

[Josemedeiros]

Good Video, and explanation. I am a backyard mechanic, that hates to work on cars, but works on my own car, because I can't afford to pay some one, and I am cheap. Can a fuel pump for fuel injection be intermittent in operation, which is much more difficult to isolate? Or do they either work or don't?

Jose F. Medeiros, San Jose, Calif

[chupalia]

@glacial5584 Go to the wiring diagram and put 12 volts(with jumper wires) to the correct fuel pump wire under the truck and see if you hear the pressurizing sounds or use an icicle light(wire tester) and see if the fuel pump wire harness has a short on the positive or a bad ground. Wires are all color coded and should be in every service manual.