How To Diagnose A Fuel Pump Failure - EricTheCarGuy

[@sammytheswitch]

My neighbor watched your video last night and we followed your advise this morning. Got it started without having to call a tow truck. On behalf of my neighbor and myself, thanks for taking the time to post this video. God Bless

[@johnswift3809]

So what did you find tell us

[@q-ball6212]

​@@johnswift3809🤣😂👌🤣😅

[@seniorgary9640]

I have learned that if you use a transmission funnel in the fuel fill tube it will magnify the sound so much you can stand at the drivers door and hear it quite well

[@Samuel-I]

Great tip .👍. I’ll def remember that one.

[@toggle_blackbox9125]

I used my oil funnel, still worked

[@codymarsh8117]

Cool tip

[@spelunkerd]

Another brilliant video, Eric. This actually happened to me while I was on vacation with no tools. The local general mechanic helped me out, spent about 90 minutes figuring out what the problem was, and charged me $20 when it turned out to be a fuse. I think he was feeling a little sheepish when he took so long to come to the diagnosis, but he was such a great guy. Salt of the earth. I did my best to help him out when he came to me years later with a problem in my area.

[@nestorramirez2248]

What fuse?

[@spelunkerd]

@@nestorramirez2248 Fuel pump fuse, usually in the underhood fuse box. It draws enough current so it is usually controlled by a relay.

[@dustinwalters1717]

Wish I heard more about good people like both of these men. Not enough good people left. God bless u both.

[@amandacaldwell3519]

This video was a life saver. I only had fuel pressure of about 15 pounds and replaced fuel pump. Lost power to the new fuel pump and was at wits end trying to figure it out. Relay tested good and so on so forth. Had no clue about the ECM-B fuse until this video. My bad for not unhooking battery during replacement of new fuel pump which is how it got shorted. Vehicle is a 2001 Chevy Express passenger van. Just want to take this time to say thank you, really helped an amateur mechanic out.

[@e.duncan6256]

Eric, this addresses an issue I’m dealing with right now, I subscribed a good while back, but I’m thankful to have come across this video today. And as a head injury survivor, your method of asking “what’s the first thing to do...and the next we should do is...” and then review the steps, isEXACTLY what I needed because I have trouble following a lot of information at once. Thank you, thank you, thank you!

[@q-ball6212]

God bless

[@tiredowalkin]

Update: I ended up replacing my fuel pump module with sending unit today, before I bought the new AIRTEX unit, I plugged the pump into the harness and cycled the key, and the pump worked, so I figured the circuit was ok just a quirky old pump. The new AIRTEX pump was easy to install and the car once again runs great! This video was a great help! Thank you!

[@jasonsaunders9640]

You saved me so much hassle. Short story - Fuel pump relay was not well seated. Found it from your video. Thanks!!!

[@nyag1764]

Guys, this is awesome. Thank you so much. Single lady here needing help properly diagnosing my car problems and my did this help! Much love and support from Austin, Texas.

[@nevursleep]

139 idiots don't know good advice when they see it. Great videos Eric. Thanks from the mechanically challenged. You've helped me through a couple problems already this year.

[@bradparker6566]

Step 1) Check the fuel gauge, the Tank could be on "E"... Step 2) Check DLC and see if theirs any trouble codes(could be a faulty Crank Sensor or something related... Step 3) Battery Voltage Check... Step 4) Spark... Step 5) Fuel System(if still haven't found the problem)... Step 6) Compression Test... This is probably the best formula for any No Start Diag Test! I love all your video Eric, keep up the good work. Pretty soon the average joe would know how to diagnose there cars from these KZbin videos and us Technician would be out of work lol.

[@johnswift3809]

Really,,compression test? R U charging customers? If you can't tell compression is not the problem while you're cranking that car you probably shouldn't be diagnosing it

[@johnbarthol6493]

Great videos Eric. With our 2003 Suburban, I did all these things and then used the side of a hammer to bang on the gas tank. That was enough to get the fuel pump started so I knew it was the pump. Sometimes this may not work depending on the mode of failure. We have had three fuel pumps put in over the life of the vehicle and all three times that little trick worked to get the truck started temporarily.

[@jorgecarrasquilla]

Finally a serious, well broken down video for guys that really want to work on their cars but just need a little guidance so they don't go changing parts without first doing a real deal diagnosis of what could be the problem! I can tel y'all just want to help...Thank you guys!! I'm gonna try this tomorrow cause I really think it's the fuel pump but just wanna be pretty sure that's what it is. You guys are alright by me! Keep it up

[@garrygemmell5676]

Brilliant that banging on the tank really works - sometimes the pump heats up and the car can drive when you first start it in the morning but i ended up getting stranded in all sorts of places - wait a few hours and the car would start - from what i can gather its a worn pump heating up and that snafus the startup. Love the vids Eric - Hoots from Scotland!

[@Rama-po6xw]

I see exact issue in car. Can I confirm it as bad fuel pump?

[@langdorn]

These types of videos probably seem mind-numbing to make and explain but the linear thought, repetition and reviewing makes it easy to understand in diagnosing these issues. Some experts can't avoid telling you EVERYTHING they know in these how-to videos. Thanks for keeping it simple and breaking it down!

[@donmelbouchard]

Love the order: start simple and move to complex. Start with cheapest options and move from there. Good, down to earth explanations. Thanks, guys.

[@djalextnt]

Probably the most helpful fuel pump diagnosis ive seen on youtube

[@walterb.7978]

First of all thanks so much for posting this video, I should mention one more thing to check for before replacing the fuel pump, that would be the fuel pump safety switch. Although not all cars are equipped with one, my 2002 Ford Explorer had it right under the glove compartment on the passenger side, all I had to to is hit the reset button on the safety switch and that got me up and running. good luck and thanks again for taking the time to post this video.

[@HustlinSpartan]

actually my friend showed me a neat trick, if you follow the fuel line from the filter to the fuel rail you will see a big bolt on top of it. Just losen the bolt a little bit and turn the ignition to "On" and fuel will squirt out of it...if it doesnt you know you have no fuel pressure.

[@MudRFunR]

Awesome video Eric! Thought I'd mention that GM's often have a bad ground wire from the pump to the frame. That's one thing I always check.

[@corywilliamsmith]

Interesting

[@lanajantz2240]

Yes I see ground you speak of.

[@Donmud]

@Ericthecarguy - Ive been working on cars since I was a teen and I must say every time I watch one of your videos I learn at least something about anything GREAT JOB!!

[@epiphaknee]

A great video! I'm glad you selected a GM Vortec because this is going to happen eventually and you might as well be prepared for it. On the way out, the whine of the fuel pump many times will change, both at prime and when the vehicle is running. Also, longer crank times will typically occur when starting the vehicle. But the end result is always the same - a no start condition.

[@driveability]

Very nice Eric, I would only add to strongly emphasize the re-setting of the engine computer between each attempt in energizing the fuel pump. Many systems need a 10 second off time in-order to get the engine computer to trigger the fuel pump / relay. You know these systems so well little things like this can sneek by the adverage DIY. Great Job !

[@rickyjohnson504]

Because it was correct

[@ericthecarguy]

@07hdflht I like to test them that way myself, in fact I often use my trusty power probe because you are correct that a fuse can look good and still be bad. The idea behind it was to encourage people to check the fuse first as it could be a very simple fix. Thanks for the comment.

[@SteveBlackOnline]

Thanks for the video. This will prove helpful. For me step #1 was to check my fuel cutoff switch since the car died and refused to start back up after experiencing a front drivers side blowout. I haven't tried any of your steps yet, but I'm praying it's the fuse or relay. I drive an '89 Ford Bronco 351 Windsor.

[@likits1999]

Awesome teamwork! Clear and concise explanation! Thanks gentlemen. Now I can diagnose my fuel pump.

[@davidforrister9597]

Hey guys, maybe I'm wrong but based on the fuse box lid, the fuel pump relay is that black relay, opposite side from that white relay. Please watch video and confirm here. Eric you have helped me so much in the past on my 2004 Bonda Element. So I was thrilled to see a video on the Silverado. I'm trying to help my grandpa with his. P,S. Hey Eric, so far your videos have saved me (keeping a running tab), $2,570 on Mechanic repair cost on my Hond Element. Your a Boss!!!!!

[@ericthecarguy]

@viggoM35 Not the engineers fault I can tell you that, keep in mind everything you just mentioned costs money and raises the cost of the vehicle as well as production cost.

[@norcoauctions]

You brought up a good point eric about checking for voltage to the pump. You are the best Eric, thank you. You care

[@randolphpatterson5061]

+bobby redondo I was going to suggest that, if you get to the point to where you are dropping the tank, run a meter on the fuel pump wires to see if a voltage is present when the key is cycled on. If everything else has so far checked out okay, you might have a broken or rotted wire from under the hood to the pump. You might want to remove the connections from the pump to make sure you get an accurate reading.

[@ericthecarguy]

@6poundsoft Perhaps in the next video. Is it just me or is it that every time a fuel pump goes out the tank is full?

[@meandi4437]

EricTheCarGuy , mine had over 26 gals . Had to raise the bed .

[@slidenthru9203]

fuel pumps go out when people drive the vehicle until it runs out of gas

[@brittanymills3191]

Mine has never been ran out I refilled it at a quarter tank to full have 25 gallon tank and the pump isnt working magically

[@slidenthru9203]

@@brittanymills3191 fresh off the lot first owner with low miles ✅ 2nd owner & high miles ❌ add a fuel pump with your tune up

[@brittanymills3191]

Mine is going to the shop tomorrow drove 2 minutes away to a gas station and everything works but not the fuel pump

[@seandonovan4186]

I like the no bull crap type of video this is. So many videos nowadays take 20 minutes to say 3 minutes worth of information.

[@marks5625]

You are amazing eric. You do a great job of explaining everything in detail but you do it in an easy to understand way. I have learned so much from you and am still learning more. Thank you for your great videos and your great effort. Appreciate you.

[@Latrodectus937]

Nice good professional instructional video, but you failed to mention a couple things. Checking for voltage at the fuel pump electrical connectors, and checking the fuel shut-off inertia switch usually in the trunk in Ford vehicles. I am convinced the fuel pump in my 2001 crown vic interceptor has failed. Not looking forward to pulling the tank to get to it. Why do they put the pump in the tank?

[@suzintru1]

Number One: Make sure the car has gas in the tank. Number Two: always check for a clogged fuel filter! Then do the steps that Shane recommends.

[@adventures223]

Most of the time the fuel filter is attached to the fuel pump so bad filter bad fuel pump or you might be able to replace filter but i would just replace the fuel pump because it probably wont be long before it goes out either way you might have to drop the fuel tank unless your lucky and its under the seat

[@manuelramos4608]

@@adventures223 you’re correct, that’s mostly old cars that have that fuel filter outside of the fuel pump.

[@mikeschrader5589]

@@adventures223 99

[@leonardkellum6984]

i was looking for a comment concerning the filter. I have the maintenance manuals the dodge mechanics used on my 87 caravan, and after testing pressure at engine - if none , check at filter.

[@Dan-kz3ws]

​@@leonardkellum6984Xxx

[@toddmeier9743]

Thank you for making this relatable for those of us who aren't mechanics!

[@ericthecarguy]

@v7nf Keep in mind the pump will only run for about 3-5 seconds when you turn it to run, if the pressure bleeds off quickly it could be the fuel pump itself as it has a check valve in it to help maintain pressure when the vehicle is off for faster start up. A pressure drop could also be the result of a leaking fuel injector, in fact I think Doge's have an issue with that.

[@franklancaster3576]

Another thing to check is the fuel cutoff or inertia switch which is designed to trip and cutoff power to the fuel pump in the event of an accident. Sometimes they trip or fail with age. Press the reset button down to reset the switch if it should be tripped.

[@simplythebestme]

I love how the videos are in such detail. Great advice and very detail oriented thank you

[@zinncomicsandart8811]

if it cranks but does not start and you suspect the fuel pump you can get somone in the car cranking and you can hit the bottom of the tank with a rubber mallet or similar item as they crank , if this makes the car start the pump is bad . Hitting the tank jars the pump and allows it to make contact and spin . Saves a ton of time on diagnosis , and I've done it tons of times and it always works .

[@CoreyTibbetts]

Before pulling the fuel pump check the inertia switch (fuel pump cut off switch) usually under the dash to see if that's tripped, could save you hours of time

[@Ripcurl552002]

Only Ford uses inertia switch.

[@valobana506]

Hi, there Eric. My '95 honda civic esi acted up (again). The engine was just cranking but won't start. First suspect was failing distributor but was eventually ruled out after testing showed there were sufficient sparks on all four sparkplugs. Went for the fuel pump after seeing this (5.32 min.) video. First found that the "click" sound that is usually heard 2 to 3 seconds after putting the ignirion key on was missing. I replaced the old pump with a Denso pump assy (part #195130-2181, if ever this matters to you). I had a good start and my engine is off running. This however, was good for 2 to 3 days only. Now, i'm back to the same problem of just engine cracking but no start. Watched some other videos and did the suggested manual pumping using a bicycle pump on the gasoline lines, with postive results each time. Problem is, the no start condition comes back again. The "clicking sound" is not audible most of the times, and result to no engine run, but comes on sometimes and i give me an engine run. Did i buy a faulty new fuel pump assy, or there is/are some other places i should look for the problem? Thanks very much and am hoping you could have time for the reply soonest. Keep safe!

[@BoZo325]

Hi Eric, In some cases you have to crank the car to check fuel pump running, week ago i had an old Audi A4 witch the fuel pump was running, only if you crank the car. Greetings Apo

[@fungoorstitch]

You could also have a bad ground wire situation that's just delightful to try and find.

[@jamieclark6338]

Hi Eric, I wanted to point out a few things. Not because I think that you don't know, but so people that don't do not miss any steps. First, just because the relay clicks does not mean it is good. Not sure if you have a video on how relays work but it would be a good little video for people. Also I didn't hear you say anything about checking for battery voltage at the fuel pump connector. If you don't check for voltage at the pump you could replace a 200$ part when the problem was an open in the circuit. Thank you for your videos Eric.

[@jjmccloud]

How do u do that just hook up the dmm to pump wires and watch for voltage when key is on

[@josejuarez2452]

I'm also having that problem right now 2006 impala 3.5 I'm getting spark I turn key and I can hear the pump buy at my gage shows no pressure and it won't start I just put new fuel pump

[@BARK3L]

Jose Juarez Did You Ever figure out the problem ?

[@josejuarez2452]

K3LBR00K yes sir the gage I was using the one that connects to the port it wears out on the bottom and it start leaking all my fuel but I also had a another problem for no start cylinder 1 has no compression at all. the rest were ok

[@panderofdeath]

You also have the inertia switch that will cut off the fuel pump

[@MrJaimesJ]

I've read on some forums that another thing to check when you suspect a fuel pump problem is the power and ground voltage going to the fuel pump. I believe you can check the power and ground using a multi-meter. My question though is where you would connect the multi-meter to so that you can get a good reading to diagnose a faulty fuel pump?

[@heyitschinoable]

Backprobing the connector

[@jameslawson8581]

Love your work Eric. Also, check the inertia switch. Like almost all my car problems, my pump works sometimes and sometimes no. 98 ford Explorer, I hate to drop the tank, but at 180,000, would not hurt to do it anyway. Might be a dead squirrel in there or something.

[@Meatwad.Baggins]

This was 9 years ago. Did you find the squirrel? 🧐

[@lijahcorral5772]

Bro this is my exact problem literally thought I wrote this comment bcuz everything u said is my issue 180000 miles and pump works sometimes

[@abaubaidah]

These are quality videos, just to make sure the pump is faulty, the last step would be to check the voltage of live and resistance to ground before taking it apart.

[@tspriggsabq]

You can also have a fuel pump on its last leg, but it still works. I had that problem. I had some hard starts and also poor acceleration. a shop said they measured the fuel pressure but it was good. Since I had about 175K miles, and I wanted to keep the car indefinitely, I thought it was worth replacing--plus I just had a gut feeling it was a bad fuel pump. Don't forget to drive off most of the fuel to like 1/8th of a tank.

[@tonyamilbry9451]

So did it work after replacing the fuel pump

[@yoshiko130]

Oh snap I just bought an Airtex blower motor resistor a day ago and I didnt know what kinda brand Airtex was until now. Thanks! keep making these videos, I went to automotive engineering and was a mechanic for a few years but changed professions however these videos are the best in keeping my mind fresh for my own repairs!

[@DashHoundRacing]

Hate to have to need this video, but thank you guys.

[@cpfielder5866]

THANKS GUYS! ; Your "Step by Step" ANALYSIS" Is Very Professional & Very Helpful !!

[@dlroberts20020]

Hi Eric thank you for your channel. I would like to suggest that it would be helpful for DYI like myself to also see and hear what does work in addition to what doesn't. For example, when you said when cycling the key we should hear the pump hum or buzz. In this video, we don't hear the sound. Using a different car, it may be helpful to show what the sound would sound like if the pump did hum or buzz. Another example is when you use the pressure gauge and this example has no pressure; it helps people like me that need info slow (lol) to see what a good pressure looks like. Anyway, just an idea. Thanks for the channel. David.

[@tommieduhswamy6860]

After checking that the relay is functioning and, indeed, working would it not be prudent to probe into the wire feeding power to the pump? Rather the dropping the tank or removing all kinds of connections this test may save several hours. If there is no power to the pump it may be a bruised or damaged wire or possibly a fault in the connector to the pump but a probe would not be the proper procedure. A visual inspection would be better or a contiuity test.

[@blackiechong4344]

Eric first make sure it is not out of gas

[@rsga011089]

cmon blackie, really -_-

[@blackiechong4344]

+SG rcelo Just some little humor to brighten your day. No kidding as this happened to my neighbor once. He could not get his car started so he changed the coils and plugs and fuel filter. He dropped about 300 bucks total then he called me. I went over and very soon found he was out of gas. Fuel gauge read 1/4 tank but put in a gallon and a half then it started and ran fine. moral of this is make sure you got gas.

[@rsga011089]

My car didn't work when i installed the fuel pump, so i just give up and called a mechanic. The mechanic came into my house to check the car and it took him an 1hr and a half to find the problem. He went back to the fuel pump and disassembled it, then put on some lubricant to the parts and cleaned it thoroughly. And it worked like a charm..

[@TheRazvy1990]

oh my god you are right...i have a friend with a fiesel car that not star....he remove the fuel injection pump...verigi everiting...and than he look....and the fuel gage broke =)))))))))

[@kevinkelly1157]

smh......then DAMN diesel cars.

[@bluedistortions]

true that. have you seen the "load pro"? you could build your own, but it's so slick and simple. money's tight but i'm really thinking of getting one. you just keep it on your multimeter like a normal probe, then click and check the voltage drop, click and check the wiring harness/connector

[@WillGold1102]

Perfect demonstration. I have done all the steps and located my issue. Thank you

[@BUSTER.BRATAMUS]

my 99 Tahoe died at wife work today..No sound from fuel pump...replaced relay, no luck..It did fire right up after introducing starter fluid, so that told me definite fuel supply problem. I did not know about that other fuse.Will try again this evening, wish me luck. Replacing the fuel pump looks like a pain unless you have a lift etc. Thanks for the video.

[@bobgraw8996]

"Mama always had a way of explaining things so I could understand them" - Forrest Gump Thanks Eric

[@dreday6369]

🤣🤣🤣🤣

[@michaelabrakson2919]

My damn fuel pump relay....smh all I had to do was unplug/plug back to start my truck to get it replaced. But instead, I had it towed to my house first. Always think electrical, before mechanical. Thats the $90 lesson I learned this 11th day of Sep 21' great video. Just wished I saw it sooner before the expense lol

[@miriams8241]

Great video; this saved me 60-150 in diagnosis that even as an IT (meaning technical) girl, I could do this! Although I need a second person to turn the key.

[@conradtonsul7343]

Couldn’t have found a better video. Thanks for making this video very useful.

[@matt8863]

Had a no start issue with an F-150...Turned the ignition to "On" and went under the hood, removed the Schrader valve cap on the fuel rail, then inserted a small tool and very lightly pressed the pin and no fuel sprayed out. That's my way without the pressure gauges.

[@lissaleggs4136]

Shade tree mechanic... 🍩

[@Terryblount]

Can't you just loosen the fuel filter and expect some leak?

[@matt8863]

@@Terryblount I wouldn't do that...Why risk a fuel spray to the face?

[@oliverrojas7117]

Thanks, great thorough demonstration of how to diagnose a fuel pump malfunction.

[@cruyeda]

My wife bought a new Audi Avante. After a year, the fuel pump got noisy enough to hear while sitting in the car. I told her to take the car to the dealer and tell them the fuel pump was going bad. I told her to tell the mechanic that it sounded like an electric razor on a countertop. She did and he agreed it was a fuel pump. They never changed the pump and one week later, it failed and she had to be towed home. She was pissed. The car was fixed under warranty but the kinked a line from the tank, which build up pressure. You could hear the pressure leaking from the fuel cap. She took it back and instead, replaced the fuel filter. I told her to drive the car and the line may unkink. she did and it did. I don't really trust mechanics anymore......

[@lufia1624]

never trust a dealer. they have no reputation to protect so they'll sheist you out of your money any way they can.

[@HBlatz87]

Thanks a lot guys, my car crapped out on me on the highway last night, gave it gas and it wasn't accelerating. Cranks fine but won't start now. I'm pretty sure it's the pump but I'll def check everything else first and keep my fingers crossed!

[@bill7774]

One trick is to swap the relay with one of the same ones. AC relay for example. Could get you back on the road if it was bad until you could replace it.

[@randolphpatterson5061]

+William G Great tip!

[@TheMrchris1234]

excellent point, William G!!!!!!!!! they are identical on my pathfinder. and in the video he says to check fuel pressure. if the pump isn't running, which was confirmed in the beginning then there is no way you're going to have fuel.lol pressure so why bother checking the pressure until you know the pump is active.lol

[@jjmccloud]

@@TheMrchris1234 That is what I was thinking lol

[@frankgarvin8542]

Thank you! My 1988 S10 pickup died while I was driving. Figured fuel pump. Replaced the blown ECMB fuse and save a bunch of time and money

[@ericthecarguy]

@streetkingz24 I'm glad to hear the video helped, thanks for the comment.

[@ivandoe33]

thanks guys, everything summarized in one place

[@skweekah]

I like Shane. He looks like an OK guy.

[@heelysblake]

1998 Ford ranger: first check the relays in the distribution box. Next check the smaller fuse in the relay box. Next Google inertia safety switch for this particular truck. If the switch is engaged that means the fuel pump will not turn on. Next look at driver side plate right at the bottom left of the door and pull the harnesses back and see if the negative bolt to the frame is sturdy. (This usually is not a problem) Find where you can hook up a compression test to the fuel rail. It is a spout that comes out to the right of the cap that says 5 W 30 oil and it looks like a bicycle tire stem_ON THE FUEL LINE STEM . In my case I knew I had zero pressure so I just used the ends of one plier on the psi spout. NO GAS SHOT UP. Next engage the key on if you hear a click that means the relay is working if you put your ear to an open gas tank and hear the fuel pump turn on that means that shouldn't be your issue. (Fuel pump) Next change the fuel filter to see if fuel is being blocked. NEXT: IT IS YOUR FUEL PUMP. OR A ELECTRICAL GROUND PROBLEM. HOPE THIS HELPS

[@plcreman]

If a relay clicks that doesn't mean it's good. Could have high contact resistance that would cause low voltage to the pump. On my suburban the horn relay is the same part number. I swapped them around for a quick test. Better test is with a bench power supply (12v) and a multimeter set to lowest setting. Contacts should read less than 1 ohm. Sometimes your leads will read .2 .3 ohms.

[@HOTRODRICO]

interesting point.. thanks for sharing

[@lotusman564]

swapping is good

[@panderofdeath]

@@EB-wi4bt in case you haven't fixed your car check your air filter isn't blocked and your spark plugs. If that doesn't work then it might be the pistons losing pressure or the timing belt. But if you aren't sure about what you are doing always have someone who knows to help you

[@autoparts321]

Thats a good suggestion jjprit, but in this example, you saw that power was coming through the fuel pump relay that was clicking (actually they didn't verify the relay was electrically good, just that it was clicking), but the fact the relay is triggering on key-on position means that the pump is being sent a power on signal from the ignition key. If the alarm was interrupting this, the relay would not click at all most likely. They didn't show the next part on this test(voltage at the pump)

[@johnalenwork53]

Step 1 check for power at the fuel pump! Step 2 check for pressure at the fuel rail! Step 3 replace the fuel pump!

[@skwigglywiggly7723]

Although the problem i have is still here this was informative and lower the possibilities of what it is. Thank you

[@hanzhigareda4423]

on the first step, what if you do hear the fuel pump when turning the key? does that say its not the fuel pump? is it possible that the fuel pump turns on but does not have enough pressure in the output? thanks

[@Slam_Chunky]

Hanz higareda I'm also wondering this. I'm going to check the fuel pressure anyways

[@MiguelRPD]

Check the pressure anyways.

[@Slam_Chunky]

Turned out the pump was running, but not steady enough to start the truck. I turned the key to engage the pump without starting it. I did that a couple times before trying to start just to get more pressure in the lines and got it to start right up.

[@Kieva_Storm]

Conversely, you may not even hear a modern fuel pump prime. Only 'good' way to verify a Fuel Pump's performance is a Fuel Pump RPM test.

[@tommieduhswamy6860]

Some GM models have poppet valves rather than fuel injectors. This system needs higher pressure to open and operate the poppets. Typically 60 to 65 psi. The pump may operate but not be able to provide ample pressure. OEM or similar is the better option when purchasing or replacing.

[@autoparts321]

I was going to ask the same question / make the same point. If you listen for the pump first and you don't hear the pump, then there's no point in checking the fuel pressure. Its only if you hear the pump and its still not starting then maybe check the pressure. If the pump is silent then check the electrical. They also didn't mention checking for power at the pump harness connector by the tank. Usually you can do that before pulling the tank, in case its a broken wire or bad connector.

[@amused2deth]

I've used an Airtex Fuel Pump. They are crap. Mine lasted 2 years. Went back to OEM and hopefully it lasts a lot longer!

[@chidude]

Same thing happened to me.

[@oneidarivera6272]

*****

[@jussomdude9357]

Well Delphi is 200+. I cut a hole to gain access and now I'm waiting till Tom to get my 50$ airtex pump..even if it dies 6 months..I can buy a few..drop em In and still not pay 200+ on parts labor

[@sincitydude7296]

hey Eric Great video. I have a 96 Grand Cherokee and I replaced my fuel pump with an Airtex a little over a year ago and this morning I broke down. I can hear a constant whining from the fuel tank when I turn the key to the on position. in the past it should only have lasted two to three seconds but it continues to whine, any thoughts?

[@wvresident7004]

Some times relays can go bad and still click. You can also tip the bed instead of dropping the tank, take the bed bolts out of the dr side loosen the bolts on the pass side and tip the bed with a board on hand to hold it up. Tipping the bed is a better way if you don't have a lift or don't want to be on the ground alot.

[@zmarssojourner7435]

WVresident what does "tipping the bed" mean?

[@jjmccloud]

@@zmarssojourner7435 I think he just means lifting up the drivers side of bed and propping it up with a board or something and the other side stays attached but bolts r loose so it'll move like a hinge kinda but still stay attached to hold that side

[@jussomdude9357]

Yea relays dont go BAD all the sudden.more than likely..a broken or rubbed wire causes a relay to go out

[@TheSteelminnow]

Wonderful video to help me diagnose my no start condition on my 99 GMC Safari!

[@scotts9961]

Thanks a lot for the video......but want to let you know that while he points correctly to the Fuel Pump relay on the cover schematic at 2:20.....at 2:27 he is actually touching the Starter Relay, not the Fuel Pump relay.....it is the black relay at the end of the row, not the corner one....

[@anthonygreenhalgh3278]

Awesome. These guys gave me some direction on checking to see if my fuel pump is working - for free. Whoo hoo...

[@briansmobile1]

Another great video! I really like this one and the WELLS video/tour.

[@myrtlelittle4130]

In between your diagnostic steps is a fuel pump control module that is sometimes referred to by slight other words. The ECM sends a message to the FPCM that ignition is on. The FPCM working properly will then close a ground to the fuel pump. No power or initial pressure without that. Check power at the FPCM on terminal 13 before replacing fuel pump. If there is no power there, it is your ECM. If there is power and proper connections test the ground connection interruption to the fuel pump by the FPCM and also a direct grounding wire to chassis from the fuel pump . These are not tested by a fuel pressure gauge showing zero and will not excite a code but can be truthed easily with a VOM. Don't blame the pump so fast. It's a helluva job. If you find any power to the actual pump, all above are working. The pump should be drawing high amps if stalled with ignition on. Infinity requires back-tracing through connection and the above. On a fuel pressure test - if there is any pressure at all, all connections are tight. Your final suspects are restricted fuel filter, FPCM (a variable voltage dispenser controlled by the ECM) then finally whittled down to the booger-of-a job, fuel pump which also has a disintegrating filter at the pick-up tube. BE calm, be diligent, you might save a thousand dollars. Three out of four under 150K are not the pump. They just don't tell you that they found the "whoops" later when the pump was not the problem. Check GM Bulletin14515B Jan 2015 covering approx "99 - 13' on the hazard recall of the FPCM. Call in your VIN to GM or any dealer to see if your vehicle was done before entering into any fuel delivery related repairs.

[@BrandonNe59]

One way to find out if the fuel pumps bad is if the label on it says airtec

[@DENicholsAutoBravado]

You mean airtex, right? I'll admit to not having tried them. I read a bunch of forums when my mom asked, what's a good brand? The got bagged on more than any other brand in my research. I have to say though, I think a lot of "bad fuel pumps" are fuel tanks that didn't get cleaned so of course the new one is going to fail too. My local AutoZone's manager said that Airtex reports statistics on warrantied pumps and they're often clogged with crud.

[@bluedistortions]

hm. that is a neat trick. sometimes you'll still need to know what PSI you're running, but for a quick check to see if you have ANY pressure, i like that. thanks.

[@Lazybiker88]

you shouldn't make a habit of checking a fuse visually. fuses can get hairline fractures in them from faulty production and can be impossible to see by eye. a multimeter check for continuity across the suspected fuse is the correct course.

[@iamburl2667]

Eric the awesome helper for so many of us, thank you sir, love your style and explanations

[@jeremytaeza77]

This helped a lot. Thanks for showing me how to check my fuel pump

[@vanilladiiip]

I had to come back on here today to Thank You guys. after i watched this i tryed most of the steps with the tools i have. I found the relay was working, so i hit the fuel tank with my snow scrapper and i herd the pump kick in and started right up drove for 30min. now im not sure if i should drive to work tonight? think this will happen again and can i quick fix it this way by hitting the tank?

[@shevinsacrey5862]

Great video but I wish you added how to check the pump itself once you figure all that out

[@jamesdrake6864]

On F250 around the 2005 yrs. modle there is a roll - over switch inside the passenger side door about ankle height, "operates similar to a motor overload" push in to check and reset. That dissconects the fuel pump .

[@TDBash]

Good video..however you failed to mention how to identify theinline schrader valve to hook the fuel pressure gauge to. For the novice, it would be easy to make a mistake and hook the gauge to an a/c line On older vehicles.

[@humptymixer]

Ok, here you go. The schrader valve is on the fuel rail and looks like a tire valve. The a/c line runs from the compressor and can not be connected to a fuel gauge, it is much larger. If you confuse these two valves stop what you are doing and tow your car to a repair shop.

[@jaysmith2340]

If you're that stupid you might as well not have a vehicle take the bus or taxi

[@astevo1983]

Helpfull video, thanks. I have a non start issue which I suspect is down to the fuel pump. I don't have the kit to pressure test the fuel system. I thought I'd disconnect the line at the fuel filter from the tank, if I turn the key to the point where the fuel pump should start I'm guessing fuel should pump out? Do you think that is a conclusive enough test to be worth spending £90 on a new fuel sender unit?

[@TheJetty2007]

what about the fuel filter? dont you check that before moving to the pump?

[@longstar550]

you will get some pressure in almost all cases if its a filter

[@TheJetty2007]

Change filter only cost me $6 bucks still no start unless I hold the throttle in a press position

[@TheJetty2007]

Oh i change the throttle body sensor with a cheap one lol , before it would not start then started one time with alot of dark smoke and a back fire flow back in the air filter box , I had code reading P0122 and P0101 but after cleaning the maf with the appropriate cleaner the code went away

[@TheJetty2007]

I appreciate your help , I'm I still looking at a bad MAF sonser?

[@thatguyb3rt]

Usually unless it's really plugged up (which is rare) you'll still be able to have the engine running but it would die at higher rpm due to low pressure

[@alnez2053]

Thanks for the info .. I’m try the test on my daughters 2006 Silverado, she told she needs new fuel pump

[@ericthecarguy]

@wizkid01 Yes I agree, the plan is to make another video talking about continuing the diagnosis at the tank. Thanks for your input and comment.

[@gogisingh5111]

Very good explanation. Majority of vedios not explain the way you guys explain. I would give you 10 over 10

[@doctorbillzable]

Excuse me sir I have the same truck and you were checking the starter relay the black one is a five pin and that's your fuel pump relay fail!

[@frankmagowan7400]

I had to check the video to see. You're totally right the Airtex guy shows you the fuse box cover and points out where the fuel pump relay is in the diagram, but misinterprets it and points to the starter relay lol.

[@doctorbillzable]

Frank Magowan I'm sure it was an honest mistake.

[@frankmagowan7400]

+Stevie Wonder For sure. And I can definitely relate though. I've read those damn things upside down initially countless times

[@anthonyskorner4511]

Old Post here, but you guys gotta know someone from these companies is not going to know much. I knew that about him as soon as he said remove gas cap to listen for fuel pump.

[@kenibnanak5554]

It is worth noting some vehicles have both a low pressure pump and a high pressure fuel pump. If the high pressure pump is bad the symptoms are easily mistaken for those of a bad EGR valve/system. The car will start and run on level ground at speeds of 25 MPH all day and offer no symptoms. However, when the engine is warm and accelerating to highway speeds (70 MPH in this area) the problem of insufficient fuel suddenly occurs.