Lag, Hard Start, Stall? Diagnose Car & Truck Low Fuel Pressure!
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- เผยแพร่เมื่อ 17 ก.ย. 2020
- Shop for New Auto Parts at 1AAuto.com 1aau.to/c/26/i/fuel-sending-unit
Is your vehicle hard to start, especially after sitting? Does it stall out, or lag when you hit the gas? You might be experiencing low fuel pressure! In this video, Len shows you some ways to check out your vehicle to see if your fuel pressure is low, and then find out why!
Here are some other awesome diagnostics you can do yourself at home!
• Driveway Diagnostics!
For More Info visit us at 1aau.to/h/cgx/
⚠ DISCLAIMER:
While 1A Auto strives to make the information provided in this video as accurate as possible, it makes no claims, promises, or guarantees about the accuracy, completeness or applicability of the content. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. All do-it-yourself projects entail some risk. It is the sole responsibility of the viewer to assume this risk. 1A Auto is not responsible or liable for any loss damage (including, but not limited to, actual, consequential, or punitive), liability, claim, or any other injury or cause related to or resulting from any information posted in this video. - ยานยนต์และพาหนะ
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@a
I have a f150 and it does all the things u say if I turn the key forward and backwards it start right up I was like is the purge valve bad? But if I fill the truck up it runs fine lol any suggestions
Well done. Thorough, well spoken, edited and useful.
One question.
Did you leave the key in the on position and engine off while waiting many minutes to see if pressure was holding??
Hello I have a question, so I have a 2008 can-am ds 450 efi .
For some reason it Turn on and drives if I continue to give it gas . But as soon as I sit in one place for longer then 30 seconds it turns off , and keeps doing that , I thought it would be the fuel pump relay but I already change it and it’s doing the same thing can you help me out
please
L
I like how fast he talks and gets right to the issue ; symptoms, testing, repairs, etc. He's not a slow talker and drags it out. Thank God. 🙂
Fantastic video! I couldn’t help but to notice that he says “vehicle” like “vyrhicle” every time though 😂
I couldn’t help but notice your unnecessary comment. I mean if you could decode his speech issue then he must have communicated effectively enough. There were literally thousands of other words. I am saddened by the state of our internet discourse.
@@rickbrower5794 Thanks for completely overlooking my “fantastic video” comment and turning a lighthearted comment into a big deal.
I am saddened by the state of our internet discourse.
Backhanded compliments are just the thing everyone likes to hear. Drew, you have a responsibility in society not to be a bully. To be taken to account when you are one. And to apologize if you realize you made a mistake. This would be akin to a person saying that someone’s hat is cool then pointing and laughing because they are blind. I hope you can understand how your words matter. If not, that’s okay. I have a great sense of humor… laughing at things like this are not funny.
@@rickbrower5794 I don’t understand why people get so offended/triggered over the smallest little things. Comparing him making an observation about his dialect to laughing at someone who is blind is a piss poor analogy. If he said something like “It’s pronounced “vehicle” not “vyhricle”, idiot.” Then that would be rude and completely unnecessary, but All the guy did was comment about an observation he made. He shouldn’t apologize nor does he have a need to. If you don’t like what he said cry about it and move on. Grow up.
All I hear is veerhichle.... I'm laughing wondering if he's playing around like "meow" on super troopers
Bro did a 19 minute workout doing nothing but hand jesters 😂 🏋🏽♂️
im sure somebody did mentioned in these hundreds of comments which i have no time to read all, O-rings in modern in-tank fuel pump+filter+regulator, need to be changed as well to reduce/prevent gradual loss of fuel pressure over time and improve fuel pump efficiency(less workload in the long-run). sharing experiences is cool.
Dude, I love the fact that you mention a 96 Dodge ram all the time lol. That is the exact truck I am working on.
I can tell this guy did extra credit on school presentations !! Great video !
Lens videos are so informative! I've n ever found anyone on TH-cam who explained things more clearly! Thanks buddy love the vids!
Glad you like them! Thanks.
Useful comprehensive fuel troubleshooting advice.Thanks 1A.
By far the best video on Utube I've seen on this subject, Well done 1A Auto and thank you for ALL your videos. Very helpful !!👍👍
Thanks for this explanation. Thorough and clear. Gonna get my pump changed out.
I don't think it could be explained any better thank you.
You're welcome! Thanks for watching
This is great you explain things in a easy to understand way so many people show so many different ways to do things and that gets people who are new to this confused thanks
I love you guys you all saved me thousands! I appreciate your videos and everything you guys do! You guys are a God send to the community that otherwise would be at the mercy of shops paying thousands, of course it helps to mechanically inclined but your videos makes life easier to understand when one has to deal with certain issues., for example me at this particular moment I'm dealing with .,.,.I love you guys! Happy Thanks Giving and Happy Holidays 2023
-Sean Robert
I always learn a lot from this site. Since I'm a DIY shady tree mechanot...this channel is rt up my alley..keep up the good info!
thank you for a comprehensive review of fuel delivery fundamentals
So many informations - thank you so much, many years of experience put into 20mins, God bless you!
Glad it was helpful!
Perfect timing for me - am having these issues - great & understandable instruction ! I feel like I should pay you for a diagnosis ♡ you have talent bro God bless
+Glenn Foster Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
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Y@@1AAuto u
Outstanding video !!! Informative and accurate. His explanation made absolute sense and covered the issues my car was having. Replacing the pressure regulator solved my problem. Thanks dude, you saved me losts of cash for a mechanic.
Thank you so much for the insightful and lucid explanations.
Glad it was helpful! 1aau.to/m/Shop-1AAuto-Now
This guy has legit taught me so much, I got a job in FL as a mechanic and I used some of his tips and made my boss look like a dumbass…. Len is very smart
Where in FL 😅
I can teach you anything you wanna know about mechanic work,
@@tommyconner1467you in florida also ? I put a hoist and a cement slab in for my chevy truck projects , sometimes i need someone to bounce ideas off of ..no one around here likes to wrench ..so there all lost on this stuff when i talk to them , and im not to knowledgeable , just enough to get me in trouble 😂
@@MikeSmith-nu9wt I'm in Georgia
The spark plug tip was grade A helpful. I am going to pull out my plugs and hope that is the issue. After all the videos I have watched and also the various sources of text-based information I feel I am starting to narrow down the issue I am having.
Great job, a little animated, had me cracking up, but I did learn a few things, and that was great. Thanks for posting.
Awesome, thank you!
Very detail. Great job on the explanation. Now I know what my problem might be.
Wow, increíble information, i know it took so long to learn such thing, and making it to happen, I have learned alot watching, i made mistake but i enjoy doing it, i think this is my job field.
In my '87 Ford 5.0L, fuel pressure is relative to the intake manifold, so the gage reading (relative to atmosphere) will drop with engine running, and can vary at least 10 PSI as you blip the throttle. The fuel tank is flat and sloshes badly even when fuel level is low. The resulting weight transfer makes it much more difficult to manage (and more dangerous) than you would think, so I made an attachment for my floor jack that supports the tank more widely AND also keeps the jack itself from tipping over. This has come in handy for transmissions that like to roll off the jack.
This guy knows his stuff 💯
thanks for that information Len you have given me great hope
This guy knows his stuff!! 💯
yeah
agreed
Except how to say vehicle 😅
This guy was pretty awesome. Great video.
I love you man, I know I'm a year late for saving my expedition but fuel pressure or the Fuel pump shat the bed. I had to keep my foot on pressed slightly on the gas, otherwise it would stall.
It's last day with me, it stalled in traffic and thankfully I managed to steer into a side street with no power, everything just shut down so it required some strength to steer that beast.
1999 expedition with the V8 Triton engine. Lesson learned.
you are the best on fuel pressure, I will say it didn't fix my problem yet but I will try Thanks
One of the BEST videos ever!
Thank you! Glad you enjoyed it!
Thanks I learned a lot. My problem is surging and bad fuel response. I'm going to try these tests and hopefully find the problem.
Very well done! A+. A skilled and knowledgeable presenter.
+Ralph J Cibula Thanks for the feedback!
You guy's put out really good videos I will get me a fuel gage and scanner, thank you!!
+GollyGeeWillLickers S Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
very informative, complete and comprehensive. Thanks
VIDEOS VERY HELPFUL. I LEARNED SOME THINGS THAT I THOIGHT I ALREADY KNEW.. HOW AND WHY MEANS. A LOT. I NEVER THOUGHT OF A FUEL PRESSURE REGULATOR... AS. A. CHECK. VALVE. I WATCHED 2 VIDEOS AND LEARNED AT LEAST 10 IMPORTANT FACTS THAT YOU EXPLAINED IN A WAY I COULD UNDERSTAND.. I AM OVER 70 YEARS OLD.AND YOU CAN UNDERSTAND WHAT A BIG HELP YOU ARE. THANK YOU VERY. MUCH.
Thank you for this info. I really believe you have just helped me with my 2000 Honda Cr-v problem
I had a fuel relay on my 4.8 in backwards. Make sure your relays are not in backwards. Needs the permanent ground on 86/30.
Your videos are very helpful thank you please keep making these...
+Ydiscovered Ydiscovered Thanks for the feedback!
Wow GREAT video! loved every minute. Did not know any of this because never had an issue and i have been a Holley carburetor since 1977; about 4yrs ago i had a problem like this and i added and inline fuel pump and it solved the problem BUTT i know it is not proper; Thankx for this video because now i know what to basically look for on a problematic 1995 Blazer 4.3L engine
From now on I will buy my parts from a1 auto you guys are 😎 🆒️ and have great knowledge
Good video! Learned a lot. Nice job 😎
Thanks for this video. I have a 2014 Silverado 3500 HD with dual tanks (gas) I've spent over 4k in the past 3 months to get it to run right, even $1400 at the dealer, and they even send me on my way not know how to fix it. I'm going to test out the fuel pressure and look into the pumps next. I've already replaced: knock sensors, all 8 injectors, all 8 coil pack plugs and wires, mass air flow sensor, tps sensor, o2 sensors, both cats. I was at a loss until this video.
Very good explanation and demonstration information about safety and DIY Thanks 👍👌🔧🙏💐
Glad you liked it. If you ever need auto parts, please visit 1aau.to/m/Shop-1AAuto-Now
I thought the video was very thorough the gentleman explained it very well and I appreciate thank you much
hi, thanks for sharing knowledge, I experienced something similar to your explanation. I have a ford focus automatic transmission vehicle which has a problem when it is started it takes a long time to start the engine and the code P0087 appears on the speedo check engine light display. What is the easiest solution you can give me to solve this problem?
Great tutorial man. Thank you.
NEVER A DISAPPOINTMENT ON ANY VIDEO FROM 1A AUTO 🤞🏽🤙🏽
Knowledgeable, professional and great speaker just like all the other people of 1A Auto I have had the pleasure to listen to..
Explanation is awesome bud!
Appreciate it!
Great video and presentation. I learned a lot
superb presentation. helps a lot of us regarding our cars
Glad it was helpful! If you need parts for your cars, please visit 1aau.to/m/Shop-1AAuto-Now
Hi, New Subscriber Here.
GreatVideo.. 👍 I like how you explain everthing. very informative!
I would've liked to see what vehicle you're using in the video and hear you touch on certain things. Such as on that particular vehicle the fuel filter is Not visible. " if I'm correct" and that's a Dodge Ram. The fuel filter is actually part of the fuel pump assembly.
But again, Great Video. You Gave a lot of info, you didn't ramble and I didn't get bored!!! 👍👍👍
ran across u on accident but heard about u from another vid. U rock n I hope good on u. can't wait to work on my suv.. thx 😊
I love the enthusiasm... Big thumbs up
Thanks for watching!
Excellent, excellent, EXHAUSTIVE video!
I want to say thank you your videos help me with my 99dodge ram 1500 5.2.
Glad to hear that!
I am a 70 year old lady my car will not start it tries to start but just want fire. I have watch about a 100 videos and your video is the best out of all I have watched. I am going to recommend your videos to all my friends.
Thank You very much for an excellent presentation. This video is very well explained . The information is very usefull.
Pretty good display, thank you
definitely gonna implement this knowledge on my "Verichle"
you 1 of the best my guy...well explained
Excellent vid!!! Learn heaps!! Probably 'solved' my stalling problem on my 2009 Kia Carnival. Now onwards, I will keep my tank at least half full and get a pressure gauge tester to monitor my fuel line pressure. What do you know about 'sticky' fuel pump? Is that also due to low fuel, overheating, bad fuel? Worn parts, time to change?
Thanks. Frank
Very informative, thank you
Amazing Video! Thank you so many times over!
Len ! love your videos ! did my serpentine thanks to you piece of cake. now i have a stalling issue with my 2012 ram 1500 5.7....ive done the plugs, serpentine, throttle body cleaning, pcv valve...it stalls at the stop sign. the rpm dips below 6000 an it stalls. if i tap the gas pedal when it starts to dip, it wont stall. i hope i can avoid a fuel pump change. it had a trouble code po463 that went away with a fuel injection cleaning. next thing i will be doing is to check MAFS, MAPS, EGR VALVE, IAC
So if fuel pressure is the issue- the simplest way to start is the fuel filter?
Or just go straight to fuel pump? You are so good at dumbing this down for DYI’s like me.
And it’s impressive that you can do it talking so fast. Great video
Thank you for sharing your knowledge god bless
Great video mate. Very informative and interesting 👍
Ha just picked up my 96 Tahoe that had a leaking regulator. Had the shop change out the old central port fuel injector to the updated multi port interior since the regulator was on it(might as well right). Oh baby she drives great now.
+Bobbie Cooper Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
Great video you guys thanks a bunch!
informative video, i like it, looking forward to apply it on my 2016 mitsubishi mirage g4
Glad it was helpful!
This was amazing. good job
This is the best and specific vidio I ever se abbot this topic.
Thank you.
Very descriptive in the diagnosis.
+jim kwan Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
Great video!! I have a 08 5.3, torqstorm, all stock block, upgraded aeromotive 340 fuel pump and 80lb injectors. At times I'd have to bled my fuel rail to start my truck. Idk what's causing this.
Very informative. I changed my fuel injectors because my car was running rich and I could smell a heavy petrol scent near the engine. When I changed them my car was running a lot smoother however still some hesitation on startup and fuel scent. While I changed them I could see that my intake valves were MASSIVELY caked with carbon deposits. Could this be the cause of my car running rich and having a hesitation om startup? Or should I check fuel pressure regulator? I am going to clean my intake valves this month just to be safe, but maybe you guys know? Best wishes from the Netherlands 🍀
Thank you so much bro,this is good information
That was really thorough. 😎👍
I have a 98 Jeep ZJ I just purchased with the 4.0 and this video has helped me tremendously on how to use a fuel gauge properly.
I've purchased from you before with great results and will do the same if my pump turns out bad.
Question: I found my fuel fill-up compartment is busted down at the bottom inside where the gas cap seats and the little flapper door is broken and pushed to the side...... I'm hoping that is the problem and i need to borrow my buddies fuel gauge. Hence this video is a big help.
Thanks and Merry Christmas 🙂
You're a star bro.
Great video, and thanks for posting. I had a leaking fuel filter on the tank side of the filter. I put a hose clamp on both sides of the filter and that seems to have fixed the leak. There was and is a 2-3 second delay in combustion before and after I fixed the filter leak. I've suspected that it might be the pressure regulator causing the delay. Your video makes me lean that way even more now. And, yesterday I noticed for the first time evidence of a small fuel leak just below the pressure regulator but also very close to the fuel rail connector. I have an '02 Taurus DOHC Duratec engine. I assume there's a replaceable O-ring on that fuel rail connector ?
Yes got a lot of information from that thank you I have a 2002 suburban with a 53 the motor was bad I changed it didn’t realize that it was flex fuel truck and I put a regular gas motor in it didn’t realize it till I was all done and the gas was running funny finally realized it fixed a couple things now my fuel pressure is at 45 psi and it’s slowly leaking after a reasonable amount of time I’m wonderingIf it’s the pump or the regulator surprisingly I didn’t have many issues changing over from the flex fuel some said I had to reprogram my ECM I did not so please any response would be grateful thank you so much
thank you sir nice explanation
+Modern Automotive Information Technology 2020 Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
Super cool video. But he didn't cover diagnosing fuel pressure drops at the injector end or the fuel pump side of the fuel system. In other words, is the system leaking down before the fuel rails or after?
Len did good on the video however i felt that he couk have went more in depth with the fuel pressure gauge he ran through the demonstration to fast and i would have liked to see every step of him attacking the gauge and seeing the results overall he done a great job /// my question to him is how do i get the fuel pressure up to regulation on my Toyota sequoia 2003 to allow it to start ??
Great and well explained video
awesome presentation
I have these issues, made a video with my phone with a manometer cranking and my mechanic says replace the pump. But i think better also filter and pressure regulator then. Thanks a lot!
Okay so I began the process of replacing my fuel filter. Following a video I removed my gas cap, started my vehicle, removed the fuel pump relay, and let it die out to relieve fuel pressure, disconnected my negative cable on battery and then I was interrupted for about 45 minutes. Replacing my filter had to be put on hold. I replaced my gas cap, reinserted relay, connected negative cable, turned key to on position, turned back to off position, waited for 20 seconds or so and then started vehicle. Started same as usual but then began to bog out idle high a few times I guess trying to stay on then idle began to decrease gradually. Just before idle needle reached 0 it paused there for barely a second and then vehicle shut off. Now vehicle will start but then just die right back out. Love your videos and trust your professional diagnosis. Need your help ASAP. This isn't only my personal vehicle it's also transportation for 4 members in household. Every job in jeopardy. Working on this all day and night until fixed. What do I do???
That is super,thank for the info
Very good educational video.🤠 Michigan Mechanic
You may want to rethink ( turn the key to on position and the fuel pump should/will run unless the pump is bad ) some vehicles , the pump does not run in the key on position , the pump runs while the engine is cranking and the pump continues to run if the engine starts - 99 corolla for example . You can hook a fuel pressure gauge direct to the fuel tank to isolate a fuel problem in the tank , or hook the gauge into the whole fuel system , its best to check both ways , you can find out if you have a problem on one end of the system , or on both ends of the system , now , do what ever you want , its yours .................
Great video, Thank you.
Idk how often y'all go back to old comments on old videos but working on a 98 lumina 3.1l. The car starts fine at first then dies out of no where. When it dies it doesn't want to start other than just continuous cranking. Fuel pressure drops about 10psi within 20 to 25seconds. The pressure regulator has suction when car is running. It primes up to 40 when key is turn to on position. I do hear clicking where the fuel injectors are but not sure if that's just what they do. My truck don't make that sound when just primed but her lumina does. had good vacuum n what not when car was running and pulles hose off of regulator. From what I was told the pressure regulator is activated via suction so when car is on. She's had new battery, new spark plugs and wires, fuel injectors, o2 sensor (one of em), gas cap, maf, and fuel filter replaced. Still same issue. Dies out of no where and doesn't want to start
Good video full of real detail !!! On another topic, have you considered uploading a Dance Video ???
Not yet!
I like your video. I have a Chevy s10 4.3 that has sit for 6 years with about 1/2 tank of fuel. I put a battery in it and filled it with fuel leaving the old fuel in it. Drove it about 100 miles and suddenly it lost power and stalled and run piss poor. Could only drive it about 5 miles an hour to get it home. Put about 5 cans of fuel cleaner and fuel booster with injector cleaner in it. Each day now I start it and let it run until it dies. Noticed the fuel pump makes a louder noise since this happened. It seems to run a little smoother each day. Hoping it will clear up in a week or so. Thanks for the video.
This guy saved my life