Chevrolet Silverado 5.3 : Misfire

[@SouthMainAuto]

*Be sure to check out PJ over at Voltage Drop Diagnostics as he demonstrates how to check injector flow to diagnose a lean problem on a Toyota. This is a method I learned from him and has been very helpful and can be added to your diagnostic arsenal as well! Tell him Eric O. sent ya* 😉 kzbin.info/www/bejne/mJvVg4KNrrd8gdU

[@shaunadams3170]

Thanks for the heads up on the new channel.

[@ruydobauch]

What kind of t-sockets you use that have a green handle?

[@TheCountryboy2782]

How do u find out a random misfire

[@pantherplatform]

These diagnostic videos are indispensable to those of us who count on them for a living. Got one on my four post right now that has a miss but only when under load and no codes.

[@debbieackerman6245]

H me og

[@luispatino3180]

After a week of scratching my brain out trying to figure out a rich running engine (that i still cant figure out)... A night off watching some SMA is all i needed!

[@DarkLinkAD]

No codes?

[@lesbest2]

@Ryan Hogan Actually will read lean, it's an O2 sensor not a fuel sensor. A misfire dumps a whole cylinder of air into the exhaust, and that is full of oxygen.

[@eileenheitman4351]

Hi Eric, After the injector swap and you fired the engine and reviewed the scanner info, you mentioned the slightly negative fuel trim averages and theorized that vapor pulled into the pvc system from fuel contaminated oil was likely he reason. Brilliant. Information like that is another reason as to why I follow your channel. Thanks for taking the time and effort to share your vast depth of knowledge. I began my learning 60 years ago in the pages of my beloved HotRod magazine. I still read it (Street Rodder et. al. have just been cancelled as a print media, sadly) and for some years now KZbin has been a huge contributor to my continued attempt to learn. You’re the best, Eric. Thanks, and best wishes to you and your family. Semper Fidelis Dave Heitman in Omaha

[@deathk26]

I recently had a sudden dead cylinder misfire issue with my '06 G6 V6. Got a P0303 (cylinder 3 misfire) along with the flashing CEL and lean codes. Went through troubleshooting steps: swapped plugs and wires between cylinders, checked spark with inline tester, checked compression on that cylinder (was 190-200PSI). Was looking like a fuel delivery issue. Tested the injector coil resistance and it was good. Checked as much wiring as I could and nothing seemed amiss. Checked the signal from the ECM to the injector and it looked good. All evidence was pointing to a clogged or stuck closed injector. I replaced the faulty injector (new bottom o-rings for all the others too) along with plugs and wires for good measure. Was a bit of a job due to having to remove the top intake plenum and everything in the way. Got it all buttoned back up and that fixed it :)

[@mikeholt3545]

So you realize not only is that a Chevy but the devils Chevy 666

[@scottfirman]

That's always the best feeling. You saved a bunch of money and did it yourself. Now days, most people cannot or will not. A job well done is the greatest feeling!

[@81crashcourse]

A persons troubleshooting ability is the difference between a parts changer and a true mechanic. Thank you for continuing to make in depth videos.

[@ALCRAN2010]

A grease monkey vs. a technician

[@bobbiebigg3]

Eric Every time ya work on a Chevy Truck I say "I didn't Build it, but I'm gonna fix it, because I bought it" I still love my Chevys.

[@nickstarks22]

THANK YOU VERY MUCH ERIC!!! For going through the effort of doing this video twice. I genuinely appreciate it. Keep up the great work!

[@kimpettit2703]

I am glad I am retired from busting knuckles as an Master Tech at Toyota for 36 years, we did not have all the fancy tools to diagnose as they are today. I love seeing the new tech world of tools to make jobs more easy and making sure things are fixed.Keep up the great work, with the videos As the old saying once a grease monkey always a grease monkey.

[@pickles-to9fq]

More towns need more shops ran like guys like you.

[@sgrichardson85]

Mistakes happen to everyone using video recording, still salvaged enough to make sense and for us to learn from. Appreciate everything you do, thank you!

[@OhioLiving]

Eric you are the absolute best technician I have ever seen. Colorful, honest and smart .. A real class act! Keep up the great videos even if KZbinrs are constantly calling you asking for help lol..

[@adventureoflinkmk2]

Things I learned from Eric O.: -- not a sponsor Set the money light What the thunder is going on here... Whoa there, fella! Whoa, man down! Chev-errr-lay! Hon-duuu Knee-San Test, don't guess! Well, there's yer problem, lady!!! The ole scope on a rope That OSHA approved bucket And uhh, just remember viewers if I can do it -- you can do it.

[@Doge8537]

Thanks for watching

[@1mrhamel]

Where did "Hon-du" come from? I understood everything but that.

[@adventureoflinkmk2]

@@1mrhamel ask Eric O., he came up with that one

[@ellobo8593]

Safety third...

[@adventureoflinkmk2]

@@1mrhamel personally I like Hon-duhhhh myself

[@tombeilman5579]

Watching you makes me want to go clean my engines, my vehicles have never been this dirty

[@jesseburns9734]

Thank you for all the videos. My wife and I took a trip to Corning this fall and I had to stop by and get a photo of myself in your shop driveway. It was a Saturday or I would have said hello.

[@Mark-vc7rm]

Jesse Burns , did they same thing this last summer. Was in Corning for a wedding and stopped by SMA on a Saturday for a photo opp in the driveway. I even saw Vinney heading down the road to dollar general.

[@jesseburns9734]

@@Mark-vc7rm My wife still does not understand why I needed to stop by. That was a highlight of my trip And Corning Glass was OK as well.

[@Shawnsullivan7]

It looked like who ever was messing with the injectors was so close to figuring it out. I’m guessing they didn’t have a scanner to to watch the cylinder misfire move cylinders when they swapped the injectors.

[@stuartkynoch7289]

Did the same thing but I met Eric and his daughter. My GF was a bit perplexed but thought it was great afterwards.

[@davidheinzmann4403]

Went to see the caboose motel 17years ago

[@repobud1]

"the old cross handed double twister" more commonly known around these parts as "tune in Tokyo"

[@anthonyl2082]

Hey SMA, I'm glad you didn't let the setback of the video error stop you. Fixing a vehicle problem can be maddening by itself. Not many can fix, video, edit, and entertain. Keep 'em coming SMA.

[@spelunkerd]

Gotta like the way the scope recorded the results, at about 6:21, and it was helpful to see how you had the pressure sensor attached later. Of course the slight variance in the pause between each test doesn't make any difference, since the duration of each 'on' time was identical. Cool to see the test automatically boosted rail pressure to exact baseline before each cylinder test. Excellent point about how excessive fuel in one cylinder causes lean misfires on the rest of the bank. It is so nice to see another SMA video!

[@JoesAutoElectric]

Nice video. I like the use of the pico on the rail for the drop test. I gives you solid numbers over just using a fuel pressure gauge. Great job brother.

[@richardcranium5839]

plus you can save and document easier too

[@allanadam4553]

Thanks Eric a day late , just replaced seals and O-rings on my injectors on a 1990 Nissan GT-R didn’t lube the O-rings, dang!!! Seamed to go in fine though? Read the manual but it’s 25 years old and the part telling me to oil the O-rings was later found elsewhere. Watching your videos have given me the confidence to overhaul most of the external bits myself because nobody wants to touch the car or even price work.

[@davidquinn6161]

When you mentioned "oil" to lube the "O" rings, I assume you didn't really mean engine oil. But just for the record, never use engine oil ( or petroleum based greases) to lube "O" rings. These will destroy the "O" rings. Only use silicone based lubes. As Eric mentioned, dielectric grease or brake grease are good. I buy "O" ring grease at my local swimming pool dealer and use it for this purpose.

[@allanadam4553]

David Quinn thanks, no I didn’t use motor oil, although I’m no mechanic by any means, I am learning. Took the engine out, the easy part😉 cleaned everything and now working on putting it back together, had turbos rebuilt, have done new seals, gaskets, oil and water pumps, timing belt and tensioner, rear main seal, flywheel and clutch, sensors, vacuum and coolant lines, fuel lines, full ignition system, MAF, and waiting for new engine wiring harness. Much of this thanks to ERIC, if I can , you can too!

[@ImTheJoker4u]

For a small job those little packets of “bulb lube” are perfect for that sort of thing.

[@jakesellers9447]

@@davidquinn6161 isn't gasoline petroleum? So how would engine oil destroy an o ring that is in contact with gasoline?

[@davidquinn6161]

@@jakesellers9447 No idea why gas isn't a problem. Just know that Eric O. and several other of the mechanics whose channels I watch, have all said the same thing. Good question. Maybe someone else has an answer.

[@KingRatt]

My initial diagnosis was to many leaves 🍁

[@AsdAsd-ej3wz]

A

[@Jlieg]

Perfect way to end my evening, some SMA. Happy New Year from here in Illinois Eric, looking forward to another year of kibbles n bits, brake clean, and not a sponsor NAPA parts

[@dennishayes65]

Jon Liegl : That’s a great looking logo Jon !!!

[@Jlieg]

@@dennishayes65 haha thank you sir. Got 3 of em in my driveway, I wont drive anything else

[@kylins.7132]

hello fellow Illinois resident! Hows it going?

[@Jlieg]

@@kylins.7132 living the life of taxation and pot holes

[@kylins.7132]

@@Jlieg dont forget the new registration fee prices. a small trailer registration went from $18 to $118, and recreational weed is overpriced. 65 for an eighth.

[@pootthatbak2578]

These small laptops and handheld computers are amazing..i remember as a kid, walking into a garage and seeing a big metal box in the bay with wire and probes, a tv monitor, i guess, an oscilloscope.

[@mikebaca522]

Eric O, My greasy old hat is off to YOU Fine Sir .. Im 64 and been fiddling with mechanics for a very long time. You fine sir are teaching this old dog new things with every vid you do. I especially love your explaing the diagnosing that brings you to the fix... Proof positive that an old mechanic can learn new things. You are right if You can do it, I can too, I just LOVE that. Best teacher I ever had , and replacing my DAD is a feat I thought no-one would ever do. So sorry for your loss. Keep the vids coming Ive got a lot to LEARN.... MB in Ut.

[@agenericaccount3935]

Mm, this is more exciting than watching a game show. The outcome isn't scripted. You may have my half hour of attention 👌🏻

[@michiganporter]

Have you been watching politics on tv? The scripted outcomes and all, it's hogwash. This is real honest and in your face entertainment

[@gvillareal72]

Hello, just wanted to thank you for your continued service that you provide on your channel. I look forward to seeing them and appreciate all that you unselfishly share.

[@gearheadautomotivel.l.c.5476]

Just goes to show how accurate that balance test is. PCM was pulling back 21% on the bank 2 fuel. The #6 injector flowed 6 p.s.i. more than the others which is 20% of 30. Excellent diag Dr. O.

[@VoltageDropDiagnostics]

Great video, Eric! This is hands down my favorite way of diagnosing injector flow!

[@CubasAutomotive]

I mentioned it was because of you.. this is my new preferred method. So much more accurate PLUS.... it's nice to have them all captured on the screen. Use cursors to compare, etc. Thanks Pj!

[@billrimmer5596]

Voltage Drop Diagnostics I knew u would notice the wps test for fuel pressure.

[@VoltageDropDiagnostics]

Bill Rimmer behind the scenes, Eric showed us youtubers the results of his test and I had a corolla that I was doing the same test on at the same time haha! Unfortunately I didn’t get to film mine. But it’s certainly one of my favorite tests for fuel injectors.

[@craigdreisbach5956]

Great video Eric. I solved my OSHA approved bucket issue by taking 36 inches of 3/8 rubber fuel line hose, splitting one wall lengthwise and securing it to the rim with goop. Wait 24 hours and then no more slipping. Plan B is to purchase a work platform (about 12 x 30 inches) with rubber tipped legs made by Werner (not a sponser). These are available at Lowes or Home Depot and often on sale 3-4 times during the year.

[@scottxp800]

I can't help but appreciate how thorough your are, personally I would just watch fuel trim corrections. If ltft drops to + or - 5% I would ship it. Also change the oil if it smells "gassy" from the #6 overfueling...

[@mitchs323]

Eric, you helped me better understand just how the fuel system works. Thanks for all the videos, they are very helpful.

[@shawndouglass314]

I wish we had a guy like you in our area. I love watching your videos. It's awesome how you do not give up on something until you figure out the issue. My 2003 silverado ss 6.0 LQ9 has similar issue. Spits and sputters. Drives ok for a minute and backfires and pops the next. Had a few local guys try to diagnose the issue and it still hasn't been diagnosed. Has random misfire code. Has codes for running rich and codes for running lean. Just frustrating to keep spending money for people to not figure out this issue. And I have a beautiful truck sitting in the garage that I can't even drive. Once again. Awesome job the people in your area hopefully realize how nice it is to have you for such issue. Stay healthy and stay positive

[@johngeyer8444]

"You're meddling in things that ought not to be meddled in. It's dangerous." Oh, how I can use this at work. Happy New Year! Thanks for your videos.

[@msd357]

I had a couple tools shipped from harbor freight, for Marie, to help her out with her newly chosen career path. I just wanted to make sure they arrived.

[@SouthMainAuto]

Yes they did and she was grateful!

[@scottfirman]

Is she going to be a service tech? I missed it.

[@94jimmy5]

I tuned in to watch another excellent diag vid but instead I learned a new mechain term: the bigger the glob, the better the job! LOL! Kudos, Dr. O!

[@0778drz110]

Do your best and caulk the rest!

[@atticstattic]

Works with flux as well...

[@94jimmy5]

@@0778drz110 Another Keeper!!!

[@wills.5762]

Give AvE a watch, you'll be able to write a whole dictionary for the Canadian Tradesman after that.

[@rgmoore]

He flubs but the recovery is awesome. that's a sign of a true professional folks. Eric, thanks for another great video.

[@adamtrombino106]

Interesting that you should post this. I just had an 06 2500 w a 5.3 that had been to 3 shops for a rich code that they couldn't figure out. They replaced o2s, pump, MAF, and oddly enough, intake o rings. Shop before them did coils on bank 2 and full ignition tune up. The 3rd was talking about a new ecm. When I got it, every cyl. on bank 2 showed misfires in history, but only 8 was current. I used my old school Snapper fuel pressure gauge with the scan tool hooked up and ran the balance test. #8 showed a 12 psi difference as opposed to the rest. Honestly, I'd not seen this style injector fail like this before, so your vid is definitely worth watching!

[@richardmikolajczakjr5016]

I work on a lot of optimum express vans with the LS engines and come across this often due to higher mileage ones it’s a cool find and the after repair is a good feeling. Love the video and diag approach Eric 👍

[@TheMrBrandonlewis]

So crazy other mechanics don’t use the tools you do to diagnose issues, I took one automotive class in college and learned how to diagnose issues like this with an o scope. My open lab teacher also told me to “not dry hump my injectors”. People who don’t know how to diagnose things end up throwing parts at it, “why don’t you change them all” ? Sometimes it’s not worth it sometimes it is, sometimes - if ain’t broke don’t fix it! Anyways love your vids always reminds me of the valuable stuff I learned from my teachers and myself from working on my own cars!

[@virtualgaragero]

Absolutely brilliant explanation, I am glad you give us a view in your diagnostic process and provide us logical, easily understandable information. You really make us feel it is so easy to diagnose those problems, greetings from Romania, I am definitely your fan! Keep up the great work 👍

[@jerfaulk8]

Really enjoy your video's, I'm an automotive mechanic myself up in Canada and I definitely like your video's and your description of the diagnostic process better than any other youtuber. I can tell you really know a lot through your experience!

[@rahrah8076]

Jay Faulk I’m from Canada Ontario too and I love his videos and the content to that he provides to help people and technicians..Eric is very advanced in automotive field..

[@petebovenzi8119]

I only wish I lived closer . I could drop off my basket case Sierra .You Rock . Just brilliant

[@resurrectionautorebuilders8465]

Since I have an 02 Suburban with the mighty 5.3, this video has been most interesting and helpful! As always, Professor O, great job! Nothing better than waking up on Saturday morning and finding an SMA video in the cue!

[@MaintenanceMan00]

Great info Eric. Always love learning from you. Especially when it comes to using the pico!

[@MattManProductions]

I hope that Mrs O is enjoying her new kitchen 😊👍, hope now that she has the kitchen she will allow you to start your own salvage yard 😉

[@jamllcmusicradio7025]

I'm having the same issue and you explained everything. They wanted to charge 900.00 just to diagnose the issue. smh. Great job!

[@baxrok2.]

The injector drop test with the WPS is a thing of beauty. Thanks Dr. O!

[@crystal1484]

I like the visual with the picoscope👍

[@marksmith6104]

24:36, I AM HAPPY WITH IT! Great diag video Dr. O.

[@montehammons7917]

I watched it twice, so's to retain in memory better. A great video, can't understand 5 dislikes-always a sour grape somewhere, everywhere. Happy new year.

[@devinslurry365]

The funny thing is that the lesser mechanics and new people can fix simple things on the first go around. God Bless.

[@JohnRodriguesPhotographer]

Mister-o! I hope you had a great New Year's with you the wife and the kids. God's blessing for 2020 and the future.

[@amygrundell]

Thanks for another good video Eric. I have worked on many 5.3s Seems to be one of the easiest engines to work on for me. Never forget I was trying to figure out why I had a misfire on number 2 cylinder on a 2007. All the usual suspects checked out. Did a compression test and found 2 was low. No leakage, just low. Took the head off and found the piston wasn't traveling to the top of the deck. Turned out to be a bent rod. How the hell does that happen? Fun stuff....

[@nickbeam5432]

Every now and then my money light comes on, i then check the codes and its 304 again, i then replace fuel injector and all other necessary things pertaining to it. I clear the codes run it for a week then the money light comes back on with the same old 304 on the number 4 cylinder on the v six 2006 jeep liberty. I am now considering the lifter to possible be bad causing a slow release of exhaust or not closing all the way in turn making it idle just a little ruff on that cylinder. some times the money light will go off for a week or two and then randomly come back on with the code of 304 on #4. Your videos help a lot in understanding the operations of things so thank you for taking the time for us to learn !

[@randyhughes5160]

Seeing you use the scope and using the scope it is so much more you are good at what you do

[@adamUDavies]

Always learning something new on the old SMA channel 👍 Happy New year to you from NW IN.

[@subjectsigma925]

I glad I stumbled on this channel, I just bought a 2002 Escalade and the videos you've made on these trucks have been incredibly useful.

[@BMan100]

Some SMA in the new year...wonderful having Eric O put me to bed ....now..I hope for a Challenger brake job video for 2020!...with the 6 piston Brembos :)

[@chrispinch3416]

Been fighting with my truck for months, this looks like it's my problem, thank you a bunch

[@alaricrivas3819]

Have a Safe and Prosperous New Year

[@Sandbag1300]

The speed of that Pico injector test is awesome! I have done the injector test manually a few times with the OTC controller and a pressure gauge. Each time I had to do the entire test twice, on eight cylinders, to confirm my numbers and even then I was not 100% sure it was right.

[@robmut1357]

“The cross handed double twister” - I think I tried that on the wife a few times. 😂

[@MookieMan1]

Rob Mut the old Gluck Gluck 9000

[@devinslurry365]

You have a wife. Praise the Lord.

[@atticstattic]

Did she buy it?

[@iskandertime747]

Expert level move!

[@joegrau5431]

🤣🤣🤣🤣

[@zm6301]

Re-enacted diagnosis is just as good as the original especially with the data you took, good job as usual.

[@beechwood619]

Best Mechanic Video's on KZbin, just need more of them, getting slack.

[@lertsomboon1481]

The best intro on KZbin... Love to watch your videos and learn. Thank you and Happy New Year

[@Nudnik1]

Just fixed one 5.3 Suburban 03. It was the plug wire on passenger rear rubbing on fire wall off coil pack and heater hose plastic y pipe oring connect above dripping on coil.Spark snapping sound heard occasionally. Intermittent. Excellent work Thanks!

[@taze27]

Great info Eric! Good to know that an issue with a misfiring cylinder could be this solution, the injectors! Saved into my Favorites folder. Thanks for the help!

[@trenttuckfield535]

You were correct on the injector clip it is designed to stay on the injector during installation and its keep it from being dropped and lost another great video very entertaining keep up the great work

[@neiljuedes1661]

Another great job ! Very informative I have. 2012 with the 5.3 and knock on wood it’s running great with 94,000 on it.

[@billyyoder8171]

Thank you Eric. Have a blessed and safe New Year to you and your family.

[@sabergermd]

Great video showing the use of the WPS500 with the Injector Balance Test to isolate an injector problem. Between you, Steve at Simply Diagnostics, Frank Massey, and Paul (Scanner) Danner I've learned a lot about getting the most use out of the WPS500.

[@ginamiller6015]

Very informative and helpful! Thank you very much for all the effort you put in to these videos. We’re so fortunate to have you on KZbin. I’ve learned a ton!

[@kdknitro]

Just something I noticed, each sides fuel pressure drop was even on bank 1 and bank 2. All the even side pressure lined up to each other and all the odds lined up to each other... just a random observation. Keep up the great videos man.

[@gunslingers5194]

Great diagnosis as always! Im a very old school tech. and even after diagnosing and correcting the problem Id still check a few spark plugs. Its just SOP for me like going to a doctor and checking temp. and blood pressure. With my luck, customer would be back in 2 months screaming warranty only to find the plugs had 100,000+ miles. Im still an analog guy adjusting to a digital world.

[@fulwell1]

Is it bad that I wish I lived near Eric, not only because his area looks to be a lovely part of the world to live, but also so he could be my car guy? I haven't had a good local car guy in a lot of years now - the world needs more Erics!

[@davidnielson5252]

Eric, that injector clip is strictly for factory assembly. The injectors and rail are installed as a unit during engine assembly. After that, its useless except to blow hole in your shoes when you throw it on the floor. Cheers!

[@dougkubash8673]

The injector to fuel rail clips are probably underneath the workbench! lol The Pico scope is definately a valuable tool! Good video!

[@GNX157]

Back in the late 80’s when I went to GM in-service classes at the Moorestown Nj training center, there would often times be engineers there and they told us before long (they made it seem like 4-5 years away lol) there would be sequentially fired injectors and the computer would control the mixture of each individual cylinder using an O2 sensor for every cylinder. Still haven’t quite got there yet.

[@davesales3129]

That was very good. I was able to see the data from before and after. I also appreciate learning your techniques like lubing the o-rings to prevent tearing or distorting. 🖖🏻🍀

[@kylins.7132]

Happy new year Eric, love from western illinois. What a night, i get to watch SMA, sit back and relax.

[@mannyfernandez6860]

Hi , I really enjoy watching your video . I drive and repair the same vehicle for 40yrs . Happy New Year from the far East....New Subscriber.

[@michaelwest6181]

Bro it would be nice if you had a shop here in Denver Colorado I’d definitely be one of your customers. you’re a good honest man 💯🙏 it’s obvious in all your work

[@PandaMan02]

kind of dangerous to assume the part pulled out is the right one when you know someone else has been messing around with it.

[@ambivalentbard4808]

What I thought as well. I'll bet he did too?

[@ralfie8801]

Maybe, but they had GM part numbers, so it was a pretty safe bet everything was correct to begin with. All bets are off when you start finding aftermarket parts in place of OEM ones.

[@russellhltn1396]

I was thinking the same thing. Perhaps the other part was too far off to fit.

[@spaceinvadertoo]

Russell Hltn Eric said the AC Delco marked part he got from NAPA was "Too short". If your girlfriend says that, just give up and go home.

[@ralfie8801]

Richard Akins The NAPA part was wrong, but it was a NAPA branded part, not the AC Delco part. That one came from Advance Auto Parts and was the correct part. Quite possibly the short injector is far a 2007 and up 5.3. I've run in to parts issues with my 2007 Silverado Classic, so normally I order the parts for a 2006 model to get the correct parts online. The confusion in the parts catalogs is due to the mid year body style change, so it's easier to call it a 2006 because nothing changed for the '07 due to the new model release.

[@paulpatience6135]

Not only do you have to work hard on cars now you even have to work hard on the recording top job

[@lonwillis783]

Thank You Eric Thank You nice to see you again.

[@robertward1993]

Eric.....I wish your shop was near my vicinity, because you would be my personal Technician 👍👍

[@davidb.fishburn9338]

Nice job, Eric. I don't know what GM's tolerance spec is for the variation between injectors, but i do agree that if it's running good and there are no codes, then it's fixed. If the pcm is happy, it's all good. I'll have to remember that about using dielectric grease the next time i have to remove and install injectors. Most of the time, it's usually specified to use clean engine oil. Thank you for taking the time to make another video, this stuff is helpful even to people that have been in the business for a long time.

[@dandearman2871]

Thank you for making these videos and I always learn something new when I watch. I bought a scan tool that I can plug in and look at a few things and your videos help me understand what I am seeing like the fuel trim and other things, what is normal and what isn't. I just bought a used 2018 GMC Sierra so another reason to watch. Days after I bought it the fuel pump died and they replaced it under warranty. The truck was acting up when I took it in and when they did a test drive it completely died on them and they had to have it towed back to the garage.

[@bostedtap8399]

Great diagnosis and love the PicoScope graph and annotation. Thanks for sharing.

[@johntuttle5396]

Useful? yes! Useable? Yes! In addition, very, very interesting! Entertainment bonus - the sayings of the scruffy guy from Harry Potter, thoughts on globs and the "twister technique". Another demonstration of the absolute need to be able to get, view and understand system(s) data in order to call yourself a mechanic in 2020. (PS - showing both repaired and broken injector data on screen (as well as your notes) is a very nice touch for understanding the process - couple of printouts provides documentation to the customer as well.)

[@devin2bievin]

I've been so inspired by Eric and family at SMA !! I'm giving everything in life The Full Beans !! God bless the O's !! Paying It Forward video was moving. Learned about used car inspections and got a bonus of seeing The Holy Spirit in action. Happy New Year O's !!

[@shermanhenderson1817]

Great Job Bro! I enjoyed watching your work in diagnostics on the 5.3L.

[@adamdaniel8147]

Thanks again for your hard work on the videos! I know for me I definitely learn new tricks and other ways to test parts and systems so thanks again for all you do!👍👍

[@alliancestrong6835]

So many fantastic innuendos in this video... Love the content brother! All love from Texas.

[@arthurfricchione8119]

another good video Eric. Thank you for the in-depth explanation. Wish Hondas had a tap in port on the fuel. Anyway Eric have a good one Artie ❤️️

[@billziegmond4943]

Saturday morning SMA video and coffe life is good.

[@gandl2123]

Great Vid. i have a cylinder misfire on #8 2011 Silverado 5.3. I replaced the spark plugs to a copper type...think they have have been at 60 but should have be gapped at 40. Ran like hell and not a 308 this time but a 300 and multiple misfire...almost wouldn't run. Soooo ordered all new wires, iridium plugs and coils (truck is high miles). Now truck runs great but back to 8 misfire and 8 plug (after putting new ones in) was much darker than the other 7 new ones. I'm thinking now that I have a bad injector that is leaking fuel into the cylinder and causing a misfire and code to set. Effects idle mostly. Question: You can change an injector without taking all of the other stuff off the top that you see in other videos? Just remove injector rail bolts? Pry up to get them out and then get back in without splitting O-rings? Or go ahead and take everything off and do it right? Tks

[@ouch1011]

I'd have been curious to see the injector resistance or a current ramp of the failed injector compared to the others. Typically when an injector coil resistance decreases due to an internal short, it will begin to overfuel because the increased current opens the injector faster (reduces its latency). Remember the old GM Multec injectors? When they shorted (assuming they didn't smoke the ECM injector driver) they would make the engine run horribly rich because the injector opened much faster. Typically it is more noticeable at idle and lower load because the actual amount of time the injector is spraying fuel is extremely short at idle, typically around a millisecond, even though the commanded injector PW might be 2.5-3ms. Thats because 1 or 2ms of that may be the amount of time it takes for the injector to physically open, so if the injector pw is 3ms, 1.5ms of that may be the time needed to open the injector and the other 1.5ms is the actual time the injector is spraying fuel. If the injector is internally shorted and opening faster, say in 0.5ms, you now have 0.5ms of injector opening time (latency) and 2.5ms of the injector spraying fuel, thus the cylinder runs rich.

[@jimbax1]

If intelligent guys like you can do it! I won't ever need to try it! but it's great to see how you solve it, and fix it !

[@willemstreutgers1154]

Many thanks for this lesson and explanation Eric.

[@stacydornan9765]

Still the best in the biz Eric