Multiple Problems/Poor Customer Communication (Low Power, Long Crank, Stalling P0171/P0174/P0121) P1
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- Опубліковано 28 вер 2024
- Link to part 2 (the follow up) • Multiple Problems/Poor...
2007 Chevy Suburban 5.3L with lean conditions from a fuel pressure issue and a vacuum leak, a dirty throttle body causing false TPS code P0121, and a charging system issue. If you are not careful with a job like this, it can end up costing you money.
Symptoms:
Long crank time, low power, backfiring through the intake, stalling, battery light on
:40 symptoms and customer complaint
2:18 what I think the problems are
3:36 code list and freeze frame data
5:05 long crank time
5:30 fuel trim data and O2 analysis
7:14 test drive to look at O2 at WOT
9:17 backfiring though the intake
9:33 forced open loop condition, fixed lean O2, how to test the O2 during this condition (do we have a mixture problem or O2 problem)
11:09 checking fuel pump current with a lab scope #uTestTerminalKit #AESwave
14:30 fuel pressure testing
17:15 addressing idle lean condition and TPS code
20:33 fuel pressure spec
23:35 fixing the TPS code/identifying and cleaning a dirty throttle body
29:14 reviewing the conditions and what we found with my brother
32:20 checking for a vacuum leak
33:05 why communication is the key
34:19 fuel psi dropped 2 psi when fans came on
35:10 idle relearn procedure
37:05 why it ran better in closed loop and after the codes were cleared
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Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express 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 the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.
Just started your premium channel this week and as recommended started with basic electrical concepts and moved to methods of testing (Chapter 1) and already am seeing what you teach coinciding in the work place. Like in Chapter 1 getting as much information from the customer. Also in the same chapter how you cover fuel trim and using a fuse jumper to the scan tool to collect data. Good stuff. I am tired of being a parts changer. I'm gonna be 58 ands it's never too old to learn. I was around for points and condensers and mechanical fuel pumps. Vehicles have come along way since then and continue to get more complex. You are a great teacher! You make learning easy. Electronics have always been my weakness in the field. Wish l would have joined sooner.
Awesome feedback! Thank you so much. Looking forward to hearing from you more.
It seems to be your go-to scanner. I'm in the market for a scope and was going to do the pico since you recommend it but my buisness is all mobile so I'm thinking this would be a better setup. Would you recommend any snap on scanners over this one or would you recommend an entry level pico ? Most videos I see you get by with the 2 channels available on the snap on
@@nikkoruscio4966 I know this is a few months old but I would go with a pico scope even as a mobile guy. You can get by with the snap on scope but when you want to do something like cam/crank correlation or something that requires looking at detail and making measurements the snap on can be a chore to use when compared to the pico. I would definitely also spring for the four channel for that reason as well. Even with a four channel you’ll sometimes find yourself taking two measurements to do some things like cam/crank correlation on a car with four cam sensors. The pick is so much more convenient to use that it’s worth carrying around the laptop for. If you want it to be ultra portable get a used Dell rugged tablet for cheap and mount the pico scope to the back.
Caleb and his edits are getting to become a fantastic aspect of this educational channel. Keeps everyone laughing 😂 while we learn.
I agree, thank you!
without some chuckling and knucklehead moments, it gets too boring for many and attention drifts off to daydream land.
Caleb adding his awesome touches 🤣😁😂
Excellent job editing !!
As soon as you said "make Danner clean it" I knew you would be cleaning the throttle body. Love your work Paul.
Caleb's editing with the highlighted PID's is on point!
Side note : my Mazda6 has a base TPS percentage of 20%. This threw me for a loop and had me going down a rabbit hole myself when I had an issue to diagnose. Until I checked with a Mazda master tech who confirmed that it's normal!
P.S. Where's the make up Paul?
Great video! Sometimes you gotta start with the obvious first and go from there. Nothing wrong with telling the customer we need a fuel pump and oil cap to begin with.
I love these mixed bag of nuts troubleshoot videos. So typical of owners who just ignore their car until it quits. In for a penny - in for a pound.
Looking forward to the next video.
Hey Caleb, it wasn't clear to me...did you dad want the fuel pump changed?? 🤣🤣
You Danner boys rock! 👏🏻👏🏻
Last week i was able to diagnose fuel pump problems using fuel trim figures. My car could start first time but had driverbility problems. Checked the MAF figures were good no vacuum leaks fuel trim total 36%. Changed pump and was good as new. Yesterday i had a customer complain about long crank time when the car sits for a while. I confirmed that long crank time, checked fuel trim figures were 15% but could drive well. I put a pump and no more long crank time. Thanks for thes videos. I have really learn't alot.
Damn it Paul that’s not how u clean a throttle body!!!!!!😂😂😂😂😂. As usual bro great stuff!
Got to love multiple problems! Can't believe the guy was driving with no oil cap! Those engines barely last when everything is right, lol - I would definitely want my oil cap! I laughed hysterically when you were cleaning the TB, knocked something over, then, "BEEEP"- censored, LOL! You sound just like me! Hard not to cuss at something in this line of business, that's for sure. Anyway, hopefully he wants the fuel pump - I want to see that, since I have basically the same truck with a bed out back. So far my pump is still alive at 117k, but the engine is a different story. Fed that thing nothing but the best synthetics since 2k miles, too. Can't win today. I bought a pickup tube o-ring and 2-bolt support brace for it - hopefully that's all it is, but I'm not that hopeful. My guess is the #2 cam bearing, but we'll see. Just sucks it's so much work just to replace this little o-ring. Nice work as usual, fellas!
I had a similar one but it was the plugged filter on the fuel pump module. After finding they drove in a dusty environment. If you let it sit then most of the crud would fall off and have to run it under heavy load for an hour or so. Then would plug off again and psi would drop to 15 psi. So changed the pump and got back up to the 55-60 psi again. There is a nice fuel pressure and flow tester fromMityvac MV5545 FST PRO. Very handy for loading the pump and verifying flow with pressure.
Danner, I use penetrant, an old toothbrush, and a shop towel to clean them. No need to take the throttle body off..... in the 90s that was chrysler's way to clean them.
thats how me and my brothers debate love the channel very informative
You need to make an episode where after a diag like this, and the problem with the previous car, you walk outside the shop and are attacked by zombies. It would make for a good ending. :-)
Wow. What a mess that car is... Just like the cars of most people I know! I don't understand why someone wouldn't put a fuel pump in however. Even if they wanted to sell the car, it seems that it would sell for much more if it could be driven. Fun video. You and Danner are great together.
One good rule of thumb is unhook the battery before messing with that throttle plate that joker can take a finger off and it also resets the how to learn on its own once battery is hooked back up
Can't unhook the battery to open the throttle with a scanner (best way to do it!) Just keep your fingers out of there
If you had a helper , could they turn the ignition to the on position (not cranked) and depress the accelerator petal all the way. Would this open the throttle? Then clean with a toothbrush. Drive by wire system of course.
@@ScannerDanner I think he meant when opening the throttle manually(by hands)
@@dougsanders6034 yes, but some cars you have to put them in gear for the throttle to react to app movement with the engine off
Excellent stuff ! Great diagnosis . Thanks for teaching !
Paul, it has caught to my attention, that you are posting al lot more content on your youtube channel then on SD premium. I'm subscribed to SD premium a long time now, but my opinion is that maybe you should post more content on SD premium then on youtube. Besides that, you and Caleb are doing a great job.
He might be trying to pull volume towards SD Premium?
Exactly what @m ph said. This is what we are trying to do. In addition we feel that the foundation is set on SD Premium, with over 500 videos and 400 plus hours of training. People can join, learn there foundations, then take off and fly, while we bring other new people in! Some chose to stay, as a way to say thank you and to support us, as we don't have a UA-cam channel membership or patreon to help, as other creators do. But we have a built in support system with SD Premium! When you support us there, it helps us bring content here!
But of course, with SD Premium, we are always working on bringing new content, and we are still doing that! In fact we've started to bring some other content creators in too, to help us. I have a diesel tech and a frontline programmer making some videos for us now for SD Premium!
There is more. UA-cam is very specific with their algorithms and getting back to steady uploads has been huge for us as far as how and when YT suggests a video to viewers. It is important to at least do our Saturday noon time releases and not miss any.
I do understand that Premium members want the frequency of new videos to at least match what we're doing on UA-cam, but unfortunately, we'd need another editor to make that happen! But we are grooming one right now too, so hopefully soon we can produce more content for both channels.
Thanks so much for your support and for the feedback!
@@ScannerDanner Thanks for the clarification Paul, i haven't looked at it that way, and it's making absolutely sense. Over the years i've learned a lot from you, so i'm happy to keep supporting you.
@@reinoutv4666 thank you my friend, I really appreciate it
test drive after every repair can be the shop's up sell too. Charging issue repaired, test drive, low power-let's look into that...
Good to see some old fashion basic diagnosis.
⏰ 19.15pm 15,1,2022 Good Evening Sir ScannerDanner take care and have a great day Sir ScannerDanner
Bottle of water 💧 Good for your body Sir ScannerDanner
As always tutorial great 👍 👌 ❤ it thank you Sir ScannerDanner 🙏 God bless your family around you Sir ScannerDanner
📷 man got the eyes for 🎥 🎞 very well done .Thank you take care .
From Nick Ayivor from London England UK 🇬🇧
This is typical in my area, 1 thing goes wrong the customer leaves it and gets used to it, then another thing goes wrong and leaves that too then when a 3rd thing goes wrong the car is horrible to drive then they bring it in. Now you second guessing your diagnosis because you think can all these things go wrong at the same time ?
Im surprised the customer didnt have the custom ping pong / golf ball oil cap option... And lets be honest, had he bought a Studebaker, he wouldn't be having any of these problems.
Hi sir Danner,
Why mechanics hestitate to replace O2-sensors,after every 50k milage/without given some problem.*
I change them as soon they reach 50k miles...even if they are working fine.*
Thanks.
Keep the good TEACHING AND PRODUCTION OF GREAT VIDEOS WITH DETAILED ILLUSTRATIONS IN DIAGNOSTICS.*
Bessings for you and your family.
👍😎
I won't change them based on mileage but based on activity (frequency and amplitude of the signal)
On these and most GM.14% at 14 or above is when they'll set that code at 12% or less you can and will have stalling problems with the a.c. on hot and warm. I keep good practice to check this as a maintenance. 06 to bla can't remember you will see around 4 to 7 . older they will go closer to 0 mainly on GM cars.
Normally when the fuel pump fails the fuel pump will get hot and short out that is what I've been taught that the fuel pump will stop working all together also the fuel pump when it's cool down then a vehicle would run okay until it gets warm then it will short out I've been known that it's a common problem and diagnosing a fuel pump and diagnosing powering grounds
Great video guys as always.Getting the all information from some customers can be a real pain.If there is going to be a part 2 can't wait.Have a blessed and safe weekend.
I would like to see a fuel volume test just to possibly explain the idle trims. I like to check alcohol compensation as well on E85 vehicles.
As a foxbody owner myself, i feel your frustration lol
Thanks for the video and seeing your process.
Good work but do not know when you treated the vacuum leak or fuel pressure leak. Thanks.
The thing you forgot to show and talk about was the GTO. lol
Hi Paul
Quick question, I’m not doubting your diagnosis AT ALL!!!
Just trying to learn about sign waves now that I have a uscope 😀
If the pump is bad, why does the fuel pump sign wave on your scope looks good?
Can’t wait for the 1986 mustang diagnosis!!!
Think because the waves are just checking 12 volt power supply and good ground. The actual signal. not actually the fuel pressure
It has good power and ground was what the amperage told us. And the characteristics of the pump waveform looked good too suggesting that it may actually be a regulator or in take leak issue, but all of this falls under the umbrella of a new pump assembly being needed. We were talking about this at times too. On this design, the regulator, filter and pump are all one assembly and do not get serviced separately. Hope that makes sense. If this had an external regulator, then further testing of that regulator would have been warranted here.
@@ScannerDanner got it 😀
(The lovely)Mrs. ScannerDanner: Hey Paul honey, have you seen my pink and white most favourite toothbrush???
🙀
Seems Danner has learned when shooting a video act busy so Scanner Danner will do some of work required
Great video! Would you recommend an oil change for this because the oil cap was missing? Please wear your seat belt next time ;)
I'm just wondering if that "oil cap lean" situation may be a clue there is an internal vacuum leak between crankcase and intake. Under the high vacuum conditions of idle, the PCV should be mostly snapped shut. But here, with a big change in the leak on removing the oil cap, surely you have a big leak of air between the crankcase and the intake? Either a bad PCV valve, or an internal vacuum leak? If you put a vacuum gauge on a tube going to the crankcase, I wonder if you'd see engine vacuum there?
That of course could be possible but what told me it is definitely a fuel pressure issue, even at idle,, is when the cooling fans turned on we had a 2 psi pressure drop 😉
@@ScannerDanner Too, when driving and putting throttle down, O2s go lean.
@@codo7 exactly
Great video, yours always are. I have a different problem. 2013 Tacoma 2.7L, I don't think this is relevant but lightning struck near the vehicle during a storm, truck started the next morning and while driving to town just shut down. No check engine light, cranks but no start, no communication, only with airbag. checked 5volt reference, 2.8 volts at mass air which I thought was not pulling down enough to be a grounded sensor but started disconnecting sensors anyway. of course all disconnected voltage came up to 3 volts but did not return to 5. Is the 2.8 volts at THA wire on maf to high to be a grounded circuit or sensor?
What do you generally see with a PWM Fuel Pump waveform with either the pump failing or module failing? I know its a squarewave for a functioning Fuel pump, does the squarewave form change or would you notice it more on an amperage reading?
The square wave you're referring to would be com lines between pump module and PCM. The actual amperage waveform won't be a true on off because the pump produces its own voltage while it is spinning when it is "off". Hope that makes sense.
@@ScannerDanner So it would be just straight lines across a scope for instance if the Fuel pump module had or was failing.. It just wouldnt be pwm anymore. But the amperage waveform wouldnt change? Ive just never scoped one of these before. Guess id better do some more reading up on fuel pump modules. I think ive just seem more pumps fail than modules.
After the new fuel pump, smoke check for evap leaks? No? Also, not going underneath to check for powers & grounds . . . shouldn’t Ps & Gs ultimately be checked right at the component to rule out bad connections, line corrosion, etc.?
Amperage pattern of the pump said powers and grounds were good!
What type of scan tool can you recommend for a home mechanic that will give you the throttle body control like that? Thanks
Think Tool makes some decently good options at a reasonable price point for programming and coding and function controls.
How do I get premium channel? Thanks
www.scannerdanner.com/join-scannerdanner-premium.html
Thank you!
Danner just confuses the shiiit outta everyone 🤦♂️
🤣
Just Scanner's luck. He's got a Tarantino directing his videos. :D
I do 😄 nice!
@@ScannerDanner I envy your working relationship with your son.
@@31terikennedy it has been a blessing for sure! Our relationship has grown so much over the past 4 years
@@ScannerDanner Since you have Caleb Tarantino as a director I was debating whether to call you and Danner Mr. Pink and Mr. Orange or just you Mr.Winston Wolf the Fixer. :D
@@31terikennedy 🤣🤣
Dumping comments on you here but are you certain 9 amps is normal? A fuel restriction can cause low flow, high pump current, resulting in your symptom.
These pumps run high. New one is 11.5 average (video coming up Saturday)
Hey What ! You just swept right past a Pontiac GTO we need to see it. Who cares about fuel pressure
It limits it so you cant steal fuel.
Wow thank you so much for fast forwarding the beard guy 🤦♂️ he’s sooooo long winded never gets to the point
🤣🤣 the beard guy is my older brother and I'm long winded sometimes too!
@@ScannerDanner lol 😂 I know dude just busting his chops a bit great video and info like always guys 👍
@@betogarzzz6392 nice!
Oxygen sensor.
👍🏻👍🏻👍🏻👍🏻🌷
Your Access to Sure-Track has expired! Please contact your Snap-On representative
😋
Paul, as a fellow Christian, I desire all the best for you. And, I think you are a great mechanic. But, your language betrays you. I am not talking about perfection. I am talking about direction. I don't see any change in direction in your language. And, that makes you look bad ... as a Christian, which you claim to be. Really, you do no one any good by quoting scripture and then by turning around and using bad language. You really need to make up your mind what you want to be. Remember, Jesus prefers that we be either hot or cold, not lukewarm.
I prefer that you not use bad language, although many YTubers do. I just wish you would be consistent in your testimony.
I very much want to learn from you. Sometimes, I just can't take the hypocrisy.
What did I say? Ass? So if I say butt instead then I'm not a hypocrite? This is called legalism in the Scriptures. Would it be better if I controlled my tongue? Of course! Do I deserve this type of confrontation publicly? Absolutely not. In fact I would challenge you that it is you that is the one hurting the witness for the gospel with this type garbage, telling me to make up my mind who I am because I said ass 🙄
@@ScannerDanner I refer to all your videos as a whole. You are free to be whatever you want to be. But, your response shows me two things: 1. Your Christian witness is not credible. 2. Your animosity toward a valid comment alienates this viewer.
Too bad. You have so much to share.
@@dws2313 while I see your point , bad language is contextual; and is defined within the cultural sects if you will, based on current worldly standards, not defined scripture, for example in early American history calling someone " a rascal" could get you in serious trouble , let alone severe condemnation, now its considered rather humorous at worst. Ergo I would postulate the context of the word in use and its intent is far more important than the word itself. finding splinters in others eyes is just as common a human trait for example.
@@ScannerDanner Let it roll off friend. There will always be Pharisees. He needs to clear the log in his own eye before worrying about your 'splinter'. As for language, there is a lot of 'scandalous' language in the OT if you take time to know the Hebrew/Aramaic references. Song of Songs as a lot of explicit erotic language in the original text. See Ezekial 23:20
@@sparkyobrian6417 Let us grant your point as an assumption. This is not about language, although I prefer to not listen to what I consider objectionable. This is about Christianity, which you may or may not be a participant.
Paul sets the tone for discussion on his videos. He claims to be a Christian and yet uses words that most people would consider impolite, at least, or bad, at most. If he is a true Christian (which I sincerely hope he is), then he must play by the rules of the Book (the Bible). If you are not Christian, then you don't play by those rules and don't care. But, since Paul brought up the subject and claims to live by the principles of Scripture, then it becomes obvious when he does not follow them.
I don't want to go long with this explanation, but let me just say what Scripture says ... "Can both fresh water and salt water flow from the same spring?" James 3:11.
To many commercials. This is worse than regular TV.
Then go watch regular tv
@@derek8159 why when i can just go watch one of the many other channels that doesn't have a commercial every 3 5 minutes.
Or better yet, i can say something and give the creator feedback so they can decide whether they want to tone it down a bit or continue and risk views.
Your suggestion is logically lazy.
sumduma55 are you a mechanic?? If you are then you know getting this kind of info for free its a GOOD DEAL, there is a lot of work put into here and somebody has to get the salary from this channel SO commercials are ok!! Think it that way
@@armandonika I did not say no commercials, I said there was too many.
Why is it that you seem to think my opinion doesn't count or is somehow wrong when you cannot even get it right?
As for the invaluable-ness of the information. What did we learn from this 40 minutes of content stretched out to an hour and 10 minutes via commercials? That something is wrong with a furl pump as provided by a pressure gage and no oil cap creates a vacuum leak. Oh and then there was the throttle body cleaning which I guess might help beginners. And that problems may be apparent in closed loop verses open loop. Something we all already knew from basic mechanical skills and understanding. The bulk of it was little more than a sitcom with the star complaining about another project and interacting with his brother for filler. Lots of valuable information there.
Now Don get me wrong, there is useful information in most of his videos. But not any more useful than any number of other channels with far fewer commercials.
But I like the entertainment value combined with the knowledge here so I'm giving feedback. It's really that simple. I'm willing to accept some commercials but they have gotten way out of hand in my opinion . You are free to disagree.
@@sumduma55 Like I said, go watch something else and keep your negative comments to yourself. If I go to a restaurant and am not happy with the service, I simply don't go back. Nobody is forcing you to watch his UA-cam videos and they are free. He doesn't charge his brother for his time, so he profits from the ads. I'm a tech also and I appreciate his content and the entertainment. These are not classroom type videos, otherwise you would be paying for the material.
"I'm not gonna clean it, I'm gonna make Danner clean it."
Proceeds to clean it himself. 🤣
Oh, man, you answered questions as I thought about them, time and again. It is so cool to have a teacher who is on the same frequency. What an interesting observation, to find the pump is working perfectly electrically, then using that as more evidence that the 'pump' is bad. Of course, if all of the regulator, filter, sock, internal tubing and pump are sold as a unit inside the tank, it doesn't matter which component has failed. You just need to prove the pressure is outside parameters and prove that the pump is getting adequate power.
Good to see you here!
starving the pump for fuel would likely cavitate and cause it's RPM's to rise, with current dropping lower. clogged filter would likely cause higher and steady current, seeing their most always pre-regulator.
so it's more likely the regulator or other leak within the tank, but it could be a combination of clogged filter/s, failing pump(check waveform on scope), regulator and leak. LOL
pretty much pull the tank and change the whole assembly or build a test tank and stand.( yeah nobody will do that)
Sometimes people just don't care. The pump probably went first, causing the long crank time. If the battery was already marginal, the extended cranking likely finished off the battery. Then, the alternator was being stressed trying to charge a junk battery. If the customer had the vehicle serviced as soon as a problem was apparent, he could have saved himself some time and money in the long run.
So typical for a customer to drive the car and for the customer to keep adapting to a vehicle that is suffering from multiple issues. The straw that broke the camels back was the charging/stalling issue. That usually brings in the most oblivious of customers. Even asking customers for details such as how it was running before the issue bringing in the vehicle is met with a blank stare. Engine management has become so adapt to failures. Both good and bad. Too bad our customers don’t have a OBD port!
As usual.... BRILLIANT diagnosis and explanation.. Please post video of the Mustang that gave you a hard time. Always learn from you.. Thanks.
Oh it's coming! Next week
So many things to consider but you break it down so we can understand what's going on, thank you.
Awesome, Thanks for sharing SD👍
That throttle plate cleaning process was quick & easy, learned another new technique😍
Special Thanks to James & Caleb Danner👍
Stay Blessed Guy's❤
Just got a Zues for my shop. Was using an Autel Elite II. Auto config worked better with 'Autel, I think anyway. What I'm saying is I feel your anger when the auto config or ID doesn't happen.
So this is how brushing the TB ..Great contents
Customer communication been killing it lately.
Watching these two very intelligent, wise, friendly brothers work together so well must make the folks so proud.
First 6 minutes of this video my mom shows up at the shop 😉ua-cam.com/video/NBqkJG500yk/v-deo.html
@@ScannerDanner you're a solid dude bub.
Aww man, I was looking forward to the "after" and finding out if there was a vacuum leak (aside from the oil cap).
Working on it! Hopefully we can make that happen. It all hinges on what else the truck needs to pass pa state inspection
I don’t know why snap on scan tools sometimes ask for the year model while other times it self ids. It’s funny because you accidentally hit the wrong year model then it tells you that the year model is incorrect according what it’s reading from the car. Just self ID the car then 😂
Right?
Even if I'm not a car mechanic I love to watch your videos.
These multiple problems from owner neglect are the toughest to diag and to explain to owners. Great job diagnosing this one. I want to see the Mustang video.
You forgot the part where the weekend warrior reuses the TB gasket after cleaning everything for 4 hours.
🤣🤣
I was thinking same thing!
245K, wow that's a lot of miles. I wish customers were more up front with all the problems their vehicle is exhibiting. Your brother was right though, once you know a vehicle has a low voltage issue then that has to be addressed before doing anything else (you know that too Paul I'm sure). Low voltage can really mess with electronics on a vehicle. P.S. , tell Caleb nice thumbnail, LOL.
Our Solus Ultra right up to the final supported software update won't auto ID most earlier Chevrolet VIN numbers. No problem GMC auto Vin ID'S They had 25 years to address this but dropped the ball.
Clan Danner,
Great video - thank you! Cant wait to see the EEC-4 follies.
Paul (in MA)
Pull over, key off, unplug maf then road test again..if still lean you have a fuel delivery problem, if pre cat sensors go rich wide open throttle you have a maf probem. Just saying. Love you and your bro.
It’s probably the regulator in this case as the pump waveform looks pretty healthy while the pressure drops off instantly with the key off. Looks like the regulator is stuck wide open. GM is so dumb with their output test control timers and their diagnostics in general. Like when you get a timing code and it totally shuts down everything with the variable valve timing and everything defaults to zeros and is ignored. It basically renders the scan tool useless in checking valve timing issues and you pretty much have to go straight for the scope. With Fords you can look at the VVT error pids and see the timing out or jumping around.
I just diagnosed a problem on that truck you're driving...,.. driver side mirror needs to be replaced...... Dam I'm getting good.
55-62 psi is good range.
I think it's not the fuel pump.
Because the fuel pump is in spect.also you have to start to put the oil cap first and see .
The engine need air escaping from oil cap and that's why you have a long crank start.
Also don't forget I injector and vacuum leak or fuel pump filter...
Thanks for video
Those friggin' GM fuel pump check valves. Usually we don't see them last long enough for the check valve to go bad, the hard metal line coming off the sending unit almost always rots away and causes our long crank times
Check how much the pump pumps in 10 seconds. multiply and find out how much pumps per hour. and check with the manual. it's faster than an oscilloscope.
Paul , I know this is an older video, but one of your better ones ! A little banter with Danner, but you stayed on point, & your dead on right ! 👍👍👍👍
poorly maintained vehicles, allways your problem, and not the customers, that looks like a truck that only ever sees a workshop, when it no longer runs,
some times you have to come back down to the real world issues with cars that most of them have multiple issues. i have found this to be true on almost all of them that i see and it is difficult to have to tell the client they have to spend a ton of money to fix it. the other thing is you have to go back to the primary side of the system as a whole ... power is number one with out it all the data can be off .... as this can be seen on this truck fixing the fuel pump is second on the list and still the client doesnt understand why they need all this work done .... welcome to the real world .... lol
New o2 sensors seem to create more check engine lights than they solve these days. Has the QC gone done in manufacturing or what!?!
Shame on you Paul... no seat belt. :-)
Scannerdanner would like you to assist me acquire an original OBD2 scanner please
Save your sanity and stick to EVAP problems. Lol
There is the pressure that the pump produces, and there is the performance of the pump. which needs to be taken into account. one does not depend on the other.
32:56 Paul & Dan can we get a video on that sweet gto ?
Missing oil cap What chevy owner lost his roll of duct tape?
I guess that's why you keep your hair so short so you can't get hold of it to pull it out. 😄😂
First time watching through, red flag at 10:45.
Isn't the crankcase part of the extended intake system (PCV)? Wouldn't the missing cap, in conjunction with a faulty PCV control device, cause the trims to be positive...?
-100
yes, they were, watch part 1 when you get a chance. When I covered the missing oil cap hole, the the O2 sensors went rich because there were positive fuel trim numbers from the vacuum leak through the PCV system
Good job sharing
I've seen misfires at idle caused by a dirty throttle plate area.
3:04 When you see a questionably cute girl at a bar
Good 👍 sir.what is deferent in mass and map please ?
How did a dod 5.3 last over 200k miles ?
The only dislike will be from ford !
Good one guys....thanks!
Costumer wants to be smart 🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣 he thought the charging system will fix the problem
I love the way that u explain letting the customer understand