Fuel Pressure Test

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Fuel Pressure Test

Рет қаралды 1,668,403

Күн бұрын

How to test a fuel pump. Learn how to test your fuel pressure, how to test your fuel pressure regulator, and how to test your fuel pump.
This video will show you how to diagnose your fuel system. If your car is idling or running weird (high idle, low idle, hard to accelerate, studdering, hard to start) then this is one of the first tests you should do. Diagnose high fuel pressure, low fuel pressure, a broken check valve in the fuel pump, broken fuel pressure regulator, or leaking injectors.
Here is the fuel pressure tester I used: www.amazon.com/...
What does a 300,000 mile fuel filter look like inside: • What does the inside o...
Fuel Pressure Regulator Replacement: • How to replace a Fuel ...
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Disclaimer:
Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.

Пікірлер: 1 200

@amandaramos9468 3 жыл бұрын

Thank you! My dad used to fix everything for me, since he passed I've had to try and be dad and grandpa for my girls. I use your videos all the time to diagnose and fix our cars. Thank you so much! (Currently dealing with an issue I believe fuel related with a 2018 Trax)

@TheEdiphone 2 жыл бұрын

you go mom its a much more difficult thing your doing than anyone could imagine and as an ol man i will say and offer any help i can as a stand in in that way please its a hand up not out and i would be proud to help ya carry the load or give ya a break in some way, and you owe me nothing in return but a thanks n a smile and i admire you my mom was like you and i watched it wear on her and thats why i make this offer again you wont owe me its what i owe already so dont be to proud to take it it would be me who would be remiss if i didnt offer with out any expectations of any kind but that smile and a thax its worth a million more than a buck was ever

@LaBamba1680 2 жыл бұрын

Gotta love that

@johnnychronicles3221 2 жыл бұрын

Your dad sounds like real man..I know my dad was a piece of shyt añd my step dad knew about cars but hated that I wanted to learn but I wasn't his kid lol daddy issues but im on you tube as well

@amandaramos9468 2 жыл бұрын

@@TheEdiphone Thank you so much! I really appreciate that!

@amandaramos9468 2 жыл бұрын

@@johnnychronicles3221 my dad was a real man, he knew how to do everything and was so very loving. I'm sorry your dad wasn't a better father and that your stepdad didn't step up. The man I'm speaking of was actually my stepfather legally, but he was my father and raised me and loved me like I was his own. Yes, I know how blessed I was/am. :)

@peyeum 4 жыл бұрын

2013 : hey guys chris fix here..... 🌧️ 2019 : HEY GUYS CHRIS FIX HERE!! 🎶☀️

@tupapirafa 4 жыл бұрын

Ha ha, noticed the same thing. He is much happier now =D

@kabloom08 3 жыл бұрын

@@tupapirafa thats because he only had about 100K Viewers back in 13'. Now hes in the millions making that big bank $$$. I'd be happier too!

@santanamcaulay1768 3 жыл бұрын

Legit

@KpopR9 3 жыл бұрын

upjw

@Xyamta 3 жыл бұрын

:-D

@marcusgarvey6151 2 жыл бұрын

The progress this man has made in 8 years is impeccable

@ivanvalentin3898 Жыл бұрын

He went from this to. Super stardom lol

@davidnizharadze2221 Жыл бұрын

0⁰⁰

@westjohnson70 Жыл бұрын

@@ivanvalentin3898😊😊😊

@Cole-Baker 2 ай бұрын

Even in this he is still better than most channels

@hollybeverly3057 2 жыл бұрын

Being a single mom having to be MOM and dad for my two boys and one girl, I have tried to cover teaching the "mom" things and the " dad " things that children learn from having two parents in the home. Your instructions have made this mom look like WONDER WOMAN to my kids when our vehicles have a case of the blues! You have our respect and appreciation for your work and instructions. Rock on man! Thank you

@mckeecrew Жыл бұрын

That "hey guys" is the most chill intro I've ever heard from ChrisFix! Love this classic!

@charliec8679 7 жыл бұрын

This has got to be the BEST DIY fuel system check ive ever seen online. Very clear, high quality video, smart guy. Covers physically the fuel injectors, fuel pressure testing, fuel pump information/testing, valve pressures. No wonder you got almost 2 million subs, nice work !! and thanks!

@theburnhams2925 5 жыл бұрын

Very clear and concise description of diagnosing fuel issues in FI vehicles. And, btw charlie c, that's 5.3 million subscribers now! Plus one (me). Thanks Chris!

@Mikesky10 4 жыл бұрын

but he is so wrong when he explaind the vacuum hose in the fuel regulator, he knows very well what it does and how it works, but he is not explaind it correctly

@reginaldharrison8650 4 жыл бұрын

He is number one make me proud to have a little skill level at my age.

@trini_boi2414 3 жыл бұрын

I agree this dude explained it very well 👍

@jokerjay-ot6zx 3 жыл бұрын

WELL DONT BE GOING OUT JUST OPENING FUEL LINES ON CARS, BECAUSE MOST NEW CARS HAVE HIGH PRESSURE FUEL UP TO 2000PSI...SO

@neilmanosteel3568 10 жыл бұрын

I watched several videos on this topic and yours was by far the easiest to comprehend. You did an excellent job illustrating the system and then providing clear and concise direction and rationale for each step along the way. I'm fixing (trying to anyway) my son's car that just died on him while driving. I just bought a fuel pressure gauge and now have some confidence to use it after your video. Thanks.

@chrisfix 10 жыл бұрын

Great! Glad my videos are helpful! Any check engine lights? Feel free to ask as many questions as you want and I will try to help!

@EspeciallyGhostNappa Жыл бұрын

@@chrisfix Hey Chris where should I connect if my truck doesn't have a Schrader valve? I have a test kit with a T and I'll grab some fuel lines so I can do an engine on and off test, but not sure where in the fuel rail I should connect to? I have a 1985 Ford F150 with the 5.0L V8 EFI.

@gordonkearney7356 6 жыл бұрын

I always enjoy the information that you impart to others. No BS straight to the point in layman's terms and always to the point. I have a classic car, 38 years old and you have helped me beyond words in the last month alone. Chris you have also instilled a degree of confidence to tackle a maintenance task that I always thought beyond me. All the way from Scotland I therefore wish you a very long and happy life my heart felt thanks Gordon.

@sfcd4757 3 жыл бұрын

i wish Chris was my neighbor

@BlickemStayBroken 3 ай бұрын

I’ve said this for 10 years now wish I could have him as a mechanic

@lloyd-qt1mg 2 жыл бұрын

Very good instruction up to 4:50 mins - I quote: "vacuum decreases on acceleration NOT increases", as stated in the video. Thanks for all the great videos that you post on KZfaq ... Top Gun!

@williamgriffin8695 Жыл бұрын

Throttle closed at idle higher vacuum, wide open throttle lesser vacuum

@CWK090 4 ай бұрын

I agree. The greatest vacuum occurs at idle. The vacuum pulls the diaphragm to open the fuel pressure regulator which allows excess fuel to return to the fuel tank. As the engine accelerates, the vacuum decreases and the pull on the diaphragm decreases moving the fuel pressure regulator toward closed maintaining adequate fuel pressure. That is my understanding.

@nathangant7636 3 ай бұрын

Vacuum does decrease upon acceleration, that's what my vacuum gauge shows which I monitor all the time when driving. The highest vacuum tends to be at idle, but it will get even higher when you let the car coast downhill, decelerate on a slope by momentarily letting off the gas pedal. You can buy a 'fuel economy gauge' which is just a glorified vacuum gauge. It's very helpful to monitor it while driving in order to minimize fuel consumption in an engine. You ideally want to keep the vacuum as high as possible at all times for best economy.

@CWK090 3 ай бұрын

@@nathangant7636 Intake manifold vacuum is high when the throttle plate is closed at idle. If you increase the rpm, by opening the throttle plate, the vacuum will decrease. To your point, intake manifold vacuum will be at its highest when both the engine RPM is high AND the throttle plate is closed like when you initially take your foot off of the gas pedal at a high rpm. That highest degree of vacuum is momentary. That is my understanding.

@hmchq 7 жыл бұрын

Thank you i just bought a 1994 corvette a week a go. Been driving it make popping noise under the hood lack of power. I tested 40 psi then drop to 0 in a sec ? I follow your video here then I replaced the fuel pump to day. what a difference it made no lack of power full power back. Thank you for all the steps in the videos it helps :-)

@shirebands7169 5 жыл бұрын

You can hear it jn his voice from then to now how much we have supported this guy. 2013 " hey its chrisfix and this is our problen today" 2019: "HEY GUY'S IT'S CHRISFIX AND IM HERE TO SHOW YOU MY ENTIRE LIFES KNOWLEDGE TODAY"

@johnalbertson79 5 жыл бұрын

None of that matters in the end. It's about the knowledge and whether or not it's accurate and reliable. I don't care if he sounds chipper or not.

@martin242011 4 жыл бұрын

Lol...so true

@titustizirai3706 4 жыл бұрын

lol

@stevenlavallee3833 3 жыл бұрын

This guy is great, every car fix video I watched of his absolutely covered every thing I was looking for, and each video on how to do the repair was easy to follow from beginning to end .The video on fuel pressure check fixed my mazda protege once I found out it was my pump. Any of the other guys videos where ok if you wanted to watch it 6 or 7 times . Great job man !! And thanks for saving me a load of money.

@Robert-.-Smith 2 жыл бұрын

@@johnalbertson79 you make it sound like he doesn't matter, just the information, no one cares how he sounds, but we do care that he is alot happier, and more confident

@bernieozzyyoksh6365 3 жыл бұрын

I like how this man is straight to the point and he let you know everything what could done with it how many he doesn’t just go to the point he goes above and beyond and it makes it extremely helpful ! Thank you so much young man

@uzerap 4 жыл бұрын

Thanks, Chris, a brilliant tutorial with nothing left unanswered. I've always wanted to know how to check the fuel pressure but imagined it to be all a bit too complicated. Now I've got a firm grasp of how to do it alongside how to diagnose problems and fix them. Thanks again.

@brad2548 8 ай бұрын

Your videos are extremely helpful to me. I struggle processing because of head injuries and the way you take the time to explain things I know I knew before you help me to be successful. Thank you sir. God bless you

@nektarios7001 3 жыл бұрын

man 8 years ago you was very cool. now at 2021 now you re pumped and hype. i like the update to your disposal.

@chrisfix 3 жыл бұрын

Thanks man!!!

@nektarios7001 3 жыл бұрын

@@chrisfix Ye man no problem. Love ur vids and u too

@davidduquesnay8246 5 жыл бұрын

Clearest explanation I’ve seen so far. Nice job!!!

@julole 3 жыл бұрын

Fantastic demonstration, right to the main points. No extra talking. Great job

@peteowens3033 9 жыл бұрын

Enjoyed your video. Very well done. I would like to point out that you did explain how the Fuel Pressure Regulator works a bit backwards. The regulator's diaphragm is actual opened more by the higher vacuum transferred to the diaphragm via the vacuum line at idle than when the engine accelerates or operates at higher RPMs. This happens because as the throttle opens the air restriction that forms the vacuum in the air plenum. As the addition air is let in from the air intake it increases air flow and reduces the vacuum. This reduces the vacuum to the regulator allow the regulator to close off more of the fuel that was otherwise allowed to pass back to the gas tank. This increases the available fuel and pressure in the fuel rail allowing the injectors to deliver more fuel to the engine. Just a bit technical but I think it helps explains to those that might have been confused as to why the pressure on the gauge actually goes up when you unplugged the regulator's vacuum line at idle. This is what causes that to happen.

@chrisfix 9 жыл бұрын

Pete Owens Thanks Pete for the clarification. I misspoke when I made the video (I said the opposite without even realizing it).

@futuresolar7074 2 жыл бұрын

@@chrisfix want to clarify with you at the end of the video how to know how to test if the fuel pump is leaking fast or if fuel injector is leaking slow (how to test?). By watching the fuel pressure gauge when shutting the car off?

@urdulearner8221 8 жыл бұрын

Great vid. Clear cam and views, clear sound, no background disturbing noises....you do care for your audience Chris. What you want to demonstrate hits its max. ! Thanks for the great work.

@jovandiaz6285 6 жыл бұрын

Bro!!! I have seen probably every video that you put up! You're the man! Keep it up.

@oviedoc5454 10 жыл бұрын

Clear, concise, excellent video on the topic. Thanks

@chrisfix 10 жыл бұрын

Thank you! That's my goal and I am glad you enjoyed the video!

@girohead 3 жыл бұрын

Whoa, this may have been the best of your vids for me. Most are good process review for me, but this one had far more educational info than I expected. I hesitantly had a shop do a 'diagnosis', but didn't watch and knew they were just throwing parts (his answer was two unrelated items and dismissed my question of fuel pump), not only do I now know the process, but you answered my two follow up questions, about injector seal and pressure regulator. Now anyone in here knows how to troubleshoot more than most shops (out here at least they just throw parts, it's not their money).

@carlwilson2539 5 ай бұрын

10 years and still relevant this man is a legend.

@Jenapantano 7 жыл бұрын

This is super detailed, I love how you show close ups and explain everything. I'm mechanically inclined but not with vehicles. (More metal work, etc) But I need to do some basic work and tests on my Jetta, this is a big help. Thank you!!!!

@yeeeyeeyeee8209 6 жыл бұрын

Jena Pantano hey

@radmansa5514 6 жыл бұрын

Thanks Chrisfix for another fantastic video. Since I have subscribed over a year ago I have really learnt a great deal from your videos! Thank you for sharing your knowledge with others

@guy9800 10 жыл бұрын

I always knew possible problems in cars. Thanks to you I know much better ways of testing for specifics. Extremely helpful to us Houston guys dealing with heat and traffic wearing on our cars

@chrisfix 10 жыл бұрын

I'm glad you found my video helpful! That's what I aim for!

@stewartbruce2409 5 жыл бұрын

Dear Chris, You certainly have the gift of being an excellent teacher. Watching your videos is one of the best ways to learn for the do it yourselver . Thank you for all the superb tutorials you produce.

@panchohughes 4 жыл бұрын

Thanks for posting this! Great video quality, easy to understand. Going to be testing my pressure on my boat this weekend!

@David-ih1ek 5 жыл бұрын

Excellent Video extremely helpful, Keep up the great work. Will definitely come back for help when required.

@daveyboyr7580 Жыл бұрын

I wish we were related or neighbors. You are brilliant. Thank you for taking the time to explain by including the intent of it.

@paulmoss7940 3 жыл бұрын

Chris you cost me a lot of time and money. I had to hunt for a year to find a nice 96 like that one ! Well almost, I got the manual LT4. Thanks for your awesome work !

@robjames3864 10 жыл бұрын

Another well thought out instructional video.Straight to the point,excellent camera work and editing of the video.

@chrisfix 10 жыл бұрын

Thanks!

@henrietn 10 жыл бұрын

Man your tutorials are excellent! Subscribed!

@chrisfix 10 жыл бұрын

Thanks for the comment and I will be publishing more how-to's every week or so.

@mygmailaccount5393 2 жыл бұрын

Best, most concise, video I've watched. Thank you so much!

@tonygutierrez5578 7 жыл бұрын

Chris, you are a big help to any Mechanic pro or amateur. thank you.

@johanbrand8601 3 жыл бұрын

I suppose only an electronic fuel pump makes that sound. That's one beautiful Corvette. Wow, I wish.

@chrisfix 3 жыл бұрын

Correct, and thanks a lot! I gotta take it out one of these days haha

@ScottysDetailing 10 жыл бұрын

Awesome video!! You got skills!!

@chrisfix 10 жыл бұрын

***** Thanks man!

@myangelc4657 4 жыл бұрын

@@chrisfix I attached my fuel pressure regulator gauge to the fitting on the fuel rail.. turned the key to accessories (on not run) and I had no movement from the gauge..it was running fine the quit.. started choking down when I gave it gas...fuel pump comes on..turns over but won't crank..I'm assuming that it's the fuel pressure regulator..am I right?

@dougpaxton7516 7 жыл бұрын

What a helpful and insightful video! Thank you. I have a running rich code on my BMW and have ruled out MAF sensor and O2 sensors. This is my next step and thanks to you I have an easy to follow diagnostic test without having to pay shop $250+

@futuresolar7074 2 жыл бұрын

Hey how did you fix your rich code on your vehicle? can you tell me your solution?

@chaoszombie9995 4 жыл бұрын

It’s amazing to see how much you have changed since 2013

@nrgmaniac 4 жыл бұрын

Your tutorials are extremely concise, to the point, and very helpful with no wasting time or bs. Great filming of your work as you do it as well. I will continue to watch your vids and recommend you to friends. Thanks ChrisFix

@bdennisv 5 жыл бұрын

Thanks, Chris. Even though I have a different vehicle, you have covered the basics very well!

@jjpski 10 жыл бұрын

Awesome video. I was able to narrow it down to the fuel pressure regulator and solve a problem that had been causing me headaches for a couple years. Bad idle and super low mileage. Thanks!

@chrisfix 10 жыл бұрын

jjpski AWESOME! Glad the video helped!

@Madasin_Paine 2 жыл бұрын

Outstanding. Precise, clear, useful, informative, and well produced and edited. Thanks!

@garyhardin5868 8 жыл бұрын

One thing you said is backwards.... When the throttle is opened you will have less vacuum, When closed you will have more vacuum. @4:53

@rezagrans1296 6 жыл бұрын

@Gary Hardin Txs a lot (sarcas) - noW u just confused me. Every1 makes mistakes, but i dont already have rigorous auto

@rezagrans1296 6 жыл бұрын

@Gary cont'd.. ...tech training background, like some of the other viewers. Trying to learn how vacuum and engine

@franceemarieesposa6116 6 жыл бұрын

Gary Hardin when the trottle is full open the RMP go up and the engine need more air and the vacuum come from intake manifold think about it,,

@jerseyjim307 6 жыл бұрын

Correct...

@stevehogsett8121 5 жыл бұрын

Dorks

@Gypsy197 10 жыл бұрын

Well done, Chris. I saw other cars going up to 50~55 psi instead of 45~50 lol

@chrisfix 10 жыл бұрын

B2Taste It depends on the car. Some injectors are built to work at 55psi, others are built to work at 35psi

@hughwillis9537 2 жыл бұрын

Whom it may concern I had a Chevy truck I was working on for my neabour 1998 it had 58 psi.when you crank it no start it would hire when you turned the key back it hit and the fuel presser would jump to 63 ..I thought I was going to have to junk it you would of thought it would have ran but No ..Well I put a new pump in from G.M. and fixed it how about that guys..Let me know if you read this this kind of jobs will make a mechanic go to Wallmart..

@myangelc4657 4 жыл бұрын

Bro this is the most well educated well informed video on a C4 I've ever seen!!! Kudos to you👍👍👍

@sasquash1957 3 жыл бұрын

Thank you dear Chris, quite useful and encouraging to probe my car's issues with fuel and stalling

@Asukmadik 7 жыл бұрын

Dude ur vids are really helpful man keep up the good work

@adam8688 8 жыл бұрын

Dude you are a genius & a champ.

@joaquinaguirre2976 2 жыл бұрын

Excellent video and good training! Thank you Chris.

@ChavezDIY 9 жыл бұрын

Thanks for making this video! You helped in diagnosing my brother's car. His fuel pressure regulator was allowing gas to pass into the intake manifold, thereby flooding the engine and preventing the car from starting.

@chrisfix 9 жыл бұрын

***** Great! Glad the video helped you and thanks for letting me know!

@ninjutsumonk83 10 жыл бұрын

you are the man!! you are doing a great job.. thank you for being such a great teacher... keep on doing a great job!!!! Happy Holidays.... A holler from Russia :P

@chrisfix 10 жыл бұрын

Thanks a lot! Happy holidays to you as well! Glad you are enjoying the videos and it is even cooler that people from Russia are watching!!!! Cheers!

@Gohan_Fanboi 7 жыл бұрын

You sir are a Car Guru Genius. But how about vehicles without a fuel pressure regulator like a 99-04 Mustangs?

@Ironmike965 5 жыл бұрын

Clear. Concise. I love it. Thanks Chris....... very helpful !

@TheMikeNan 11 ай бұрын

Thank you very much. Your video helped us determine our problem. It was the fuel injectors on a 2006 Ford 4.0L engine.

@Matterhorny 5 жыл бұрын

Great vid and tutorial 👍

@John_Ridley 4 жыл бұрын

Accelerating = lower vacuum. Decelerating = higher vacuum.

@michaelsoutherland3023 4 жыл бұрын

Is that why the brake booster runs off vacuum ? ;)

@John_Ridley 4 жыл бұрын

@@michaelsoutherland3023 Yes, perfect fit for that. There's generally a good reserve of vacuum anyway for that. As a kid I sometimes drove the 1936 Chevy flatbed truck. It had vacuum windshield wipers and a vacuum actuated 2 speed rear axle, and the engine was so clapped out it hardly made any vacuum at all. The axle was a nightmare, you had to double-clutch it to get it to shift and it only would shift with enough vacuum which could only happen when you were letting off the accelerator. Lots of grinding. The wipers always stopped in front of the driver's face.

@bers0028 8 жыл бұрын

One of the best videos I've seen on troubleshooting a particular subject. Informative, concise, great video quality, great commentary, great job!

@dougjamesvandals 9 жыл бұрын

yes, I did have low pressure and starting issues, I feel foolish because the filter has about 25k on it and I change my oil every 2000. Im thinking a dirty filter. I plan to keep a gauge on and test for a week. No doubt pump is weaker than a new one but then with a dirty filter compounded the problem. Ive learned alot though by trying to diagnose the problem. Videos like yours sure help.

@chrisfix 9 жыл бұрын

dougjamesvandals Dont feel foolish. My fuel filter has 300k miles on my van haha. Definitely keep me posted!

@toneillish 10 жыл бұрын

How are you going to dislike this video? Good info!

@chrisfix 10 жыл бұрын

toneillish Thanks man!

@ronstonge2866 7 жыл бұрын

nicely done

@mauriciodelossantos7647 Жыл бұрын

This man is awesome I have a 94 Corvette with a fuel problem these guys response to all my questions that I have love the video

@ACommenterOnYouTube Жыл бұрын

Bullshit, he has NEVER replied to my questions ....

@kickemassicus 6 ай бұрын

Great video bud I learned alot. I love you you get right to it, there's no 2 minute preamble about stuff no one cares about

@snaprollinpitts 10 жыл бұрын

thanks Chris!!! thumbs up!

@chrisfix 10 жыл бұрын

Thanks and no prob!

@jet_9119 10 жыл бұрын

Criss fix your video are cool!!

@chrisfix 10 жыл бұрын

Thankssssss

@heavyfeather6682 6 жыл бұрын

Thankyou for all the videos you make man i greatly appreciate it! Your videos are the best quality and you make complex systems easy to understand which is a hard thing to do.

@superseaner Жыл бұрын

Tanks so much for the ideas on my 2012 caravan!!! I think I can fix it!! fingers crossed!

@carlosfilipepereira284 7 жыл бұрын

theres more vacuum at idle

@Frankgaming 7 жыл бұрын

true

@rizalgaliza5125 6 жыл бұрын

No shit. Just sayin

@stellarv5689 6 жыл бұрын

Why can't you be my neighbor

@hcashmore11 4 жыл бұрын

He might be? we've never seen his face!

@jamesshaw4954 3 жыл бұрын

@@hcashmore11 there's a bunch of vids with his face in it

@AdrianodePaula2 3 жыл бұрын

If you're in New Jersey, you can be close to him.

@jamescorley9940 Жыл бұрын

Very good video went straight to the point without all the talking 😅

@akonfest 7 ай бұрын

Oh wow stumbled upon Chris fix from 10 years ago! Such a different vibe!!

@vencentbauer 8 жыл бұрын

the needle shouldn't move that much on a snap way to much I would throw your low amp clamp on the fuel pump circuit and count your humps I bet it around only 3000 rpm I bet there is a miss on hard acc

@AlfonsoB1940 8 жыл бұрын

Hi Chris: I'm confused, I've watched a dozen videos on this subject and just when I thought I understood how it works...you tell me that it's to the opposite of what I understood....I thought that in an idle situation vacuum in an engine is at it's highest level..(throttle plate closed) and this high vacuum opens the fuel regulator to the max because very little fuel is needed so what is not used is returned to the tank. When the engine is accelerated (throttle plate open) vacuum falls off and fuel consumption increases and to maintain the pressure the lower vacuum lets the fuel regulator close to maintain the pressure in the fuel rail. I have a problem with a 2001 Santa Fe 2.7 GLS and I'm far away from scanners and vacuum pumps. That's the reason I'm watching so many videos....I'm not saying that you are wrong or not try to be smart...I just need to know.

@markhughes8558 7 жыл бұрын

He does have it backwards, when the throttle is closed is when you get the highest vacuum. I'm old enough to remember vacuum operated windshield wipers that would quit when giving the engine more gas plus he showed high vacuum when he unplugged the fuel rail regulator at idle.

@3035looney 6 жыл бұрын

Did you ever find the fix to your problem? I also have a 2001 Santa Fe GLS 2.7 and it has a very hard time starting, always. When it does start it runs perfect though.

@linksword1514 5 жыл бұрын

hey just wanted to comment i have a 97 Cadillac seville sts that i got from my aunt and her grandson drove it to the ground and then didnt run it for 2 years and now im fixing it and its been giving me a random misfire and this was exactly wat i needed for checking my fuel pressure thx a lot

@shannonrowland1608 2 жыл бұрын

Very informative and helpful. What to look for and why along with giving examples of what the problem may be. Kudos, you did an amazing job.

@paftaf 4 жыл бұрын

4:40 I think you made a mistake. At idle, vacuum is highest. When accelerating, vacuum is less. That's why when you disconnect the vacuum line, it simulates high throttle.

@jacknickolstine3355 4 жыл бұрын

Yes

@jacknickolstine3355 4 жыл бұрын

I also have dyslexia and I'll say the opposite of what I mean. There are 2 types of dyslexia I believe, one is for incoming information like seeing letters backwards when reading. The other type is out going information like giving directions, explaining something, or writing letters backwards. It's frustrating because you know what you mean to say but it literally comes out the opposite.

@jacknickolstine3355 4 жыл бұрын

@John Smith giving directions is always fun. It's weird because i dont try to go the wrong way if I'm driving. I guess it has a disconnect and only effect speech. Shit is weird, it was alot worse when I was younger.

@gartheligon140 4 жыл бұрын

I knew Chris made a mistake when vacuum is low or high.

@s0nnyburnett 10 жыл бұрын

Vacuum is highest at idle and lowest at WOT.

@chrisfix 10 жыл бұрын

Yea, I misspoke unfortunately. You throw a camera in the equation and you would be surprised how hard it is to get a good sentence lol.

@labradormcgraw 4 жыл бұрын

These videos are in a different league from anything else on KZfaq. You just cannot beat a ChrisFix video.

@natsaichigwada6104 6 жыл бұрын

Very helpful and educating .... Now i can check wife's car that is starting intermittently. Starts fine and sounds like will stall and all of a sudden it runs. I am suspecting fuel delivery issues. When gas pedal pressed it starts right away. Will start with checking basic stuff. Thank You

@drewt1081 5 жыл бұрын

if it has a schrader valve, uncommon nowadays tho...

@shanerudberg6364 3 жыл бұрын

Wym most cars still do

@smitdesai3718 4 жыл бұрын

Saw ur face ☺☺☺👆

@lindyp38 Жыл бұрын

Thank you. My 93 corvette will be needing a new fuel Pump.

@roberthamlin6638 2 жыл бұрын

Best videos I’ve seen on KZfaq. Thanks

@GlycerinZ 7 жыл бұрын

My LT1 Trans Am started running like absolute crap. Connected a gauge, when I prime the fuel pump, the gauge shows 10psi or less

@chrisfix 7 жыл бұрын

Wow, you know what that means: kzfaq.info/get/bejne/o6p5n9qT3ZamXac.html

@GlycerinZ 7 жыл бұрын

Oh God please no! I already had this happen on my Camaro years ago. Removeing the pump on GMs F-body sucks. Funny because I watched that video after you uploaded it. Thanks for the reply!

@Matanumi 7 жыл бұрын

yeah.. I have a minivan here with a similar problem and the sender stopped working properly miles back... time for a whole pump assembly and man! they aren't cheap

@carolinavillarreal5306 7 жыл бұрын

Glycerin

@GlycerinZ 7 жыл бұрын

It was the fuel pump. Car runs great now

@RukarioEnterprisesLLC 2 жыл бұрын

For some reason, ChrisFix doesn't sound right, he sounds sickish

@mikealruesch9760 4 ай бұрын

That’s just the way he talked then vs now. In every older video he sounds gloomy. He sounds more hype in newer videos

@lukefisher1858 9 жыл бұрын

Nice video. Never used one of these tools and you really answered a ton of questions i didn't know i had. Going to work on a 99 blazer with this crazy 'fuel injector assembly'

@chrisfix 9 жыл бұрын

+Luke Fisher Awesome! Good luck!

@MRSketch09 8 ай бұрын

This video is helping me with my 99 4.0 Ford Ranger. ..

@rezagrans1296 6 жыл бұрын

What a nice, humble person. Stay blessed Chris

@madflysports8458 4 жыл бұрын

At 4:50 you got the vacuum and pressure situations backwards. At idle the vacuum is highest.

@robertthacker2689 9 жыл бұрын

I am 65 and very glad you do these movies to show us how to do it right. Thanks Bob

@chrisfix 9 жыл бұрын

Robert Thacker Thanks a lot Bob!

@coreyjames30 2 жыл бұрын

Thanks for this, I always choose your videos over others because I like the way you explain things.

@williamcooper9591 4 жыл бұрын

Thank you very much for this video. I am having issues with my 2001 Monte Carlo. This is exactly what I needed to see.

@tellitallnow3914 4 ай бұрын

Bro, this is the best most informative video I have ever seen on KZfaq by FAR for fuel issues!! You know your shit and THANKS for educating us dummies that are trying to learn. Your Top notch teacher, and would bet 1000 bucks your a master machanic . If not your dam close. Thanks again for sharing your knowledge!!

@chrisfix 4 ай бұрын

Thanks!

@fireblade211 8 жыл бұрын

Thanks Chris. You are a natural teacher.

@chrisfix 8 жыл бұрын

+fireblade211 thanks

@kreativekwads2206 8 жыл бұрын

This is one the cleanest, easy to understand DIY vid ive ever watched. Def thumbs up

@gorillahumpr 4 жыл бұрын

Fantastic videos and diagnostics, but vacuum drops when the throttle is open. Just a lil fyi. Easy peasy. Thanks for the videos. Me and my roomie are watching your videos just to gain some knowledge

@ajkrisko7051 4 жыл бұрын

Tons of help for my 94 lt1!

@icysteve46 5 жыл бұрын

I almost chocked on my mac n chess when you popped that plastic cover off your engine and everything was right there begging to be touched. Nothing on my vehicle is accessible without a crowbar, blood and ten minutes of profanities that get all the neighbor kids yanked into their homes by moms.