This Ford F150 Is Running Rough With Lean Codes And The Client Thinks It’s A Vacuum Leak…

[@Chainsawburrito]

I thoroughly enjoy these in-depth real time diagnosis videos. They help me tremendously is my own diagnostic process at work, great content as always! Would love to see more engine performance diagnosis as well in the future using O2's and fuel trims!

[@darinjohnson7280]

Great video Sherwood and crew! I learn something new every time! Hopefully the customer installs some good quality injectors, have had so many lately come in with issues with new cheap injectors! Had one a few months ago with extremely negative fuel trims and the customer just installed a 80 dollar set of Amazon injectors, new ones cured the problem. I always try to use OE if available. Bought a set of Standard Motor Products a while back and they were re-boxed Chrysler injectors..

[@brianmason8400]

Yeah, we've seen how the "do it yourself" repairs go ....just had an 07 Navigator. Cust replaced all the coils and plugs themselves and attempted to wire in two new coil and 1 injector pigtails. All the heat shrink work looked good, but the crimps weren't worth a crap and they broke the locking tabs on two other coils and injectors so they wouldn't stay plugged in. I wound up having to replace two more coil and injector pigtails and resolder everything they tried to crimp.

[@mikedavidson2117]

Another in-depth analysis and possible options for your client if they can’t afford to do it the right way always a learning experience my scope ability is getting better because of you and thank you and your staff very much.

[@andrewgow8619]

I wish I had the knowledge base to understand your videos. I’m sure they’re super helpful to those that know what they’re doing.

[@waqasazmat81]

Love the knowledge you provided, one of the hardest thing to tackle lean and rich codes. Thanks to you guys and others who are willing to share knowledge.

[@hawkeye7558]

Another great video! Always enjoy how you explain the thought process as you are diagnosing the vehicle.

[@DependableAutoTruck]

i have one of the older scanners that did the test by each cylinder where you could see fuel pressure drop on each cylinder i like that test better because you can show customer injector 1 only dropped 20 psi injector 5 only 2 psi clearly 2 is stopped up makes it easier for customer to understand. i also have a buzz box but not worth much when injectors are covered up like on the 3.6 dodge and some of the fords

[@Mdavied2023]

@ minute 7:30. You said, 'If you take off idle and it corrects itself, then we know it is a vacuum leak.' I'm 100% sure. Also, if you have a bad injector or injectors and take off idle, it will correct itself too. This just happened to me with my 2002 Toyota RAV4 three days ago.

[@midwestlee-iw8nl]

yea that was my gut feeling , probably a dirty injector . but a good job taking everybody with the procedure.

[@copiertech101]

Thank you very much I really appreciate the diagnostics I'm going through the exact same thing on my F-150 right now perfect timing. I narrowed mine down to be cylinder number four injector put one injector from pull-a-part in it runs good now thank you very very much

[@Juliamalave8989]

Great video, I don’t see the link for Joe’s wand

[@spirokattan3655]

Good diag Sherwood. It would have been interesting to see if misfires would have been more pronounced via tail pipe pressure transducer. Thanks for posting!!

[@scotttrent4589]

FYI the escan has the relative compression test like the first test with the zeus

[@ThunderbirdRocket]

Excellent stuff ! Thanks for providing another one !!!

[@FPSMurdock]

Loved the video and the continued education you give us all!

[@letzrockitrite8469]

In case plugs have contributed to the cause of the failed injector would you suggest plugs to the customer with 180K miles? thanks for the great videos and dedication to the trade !

[@TnShooter-is4gr]

Great video. Enjoyed the diagnosis on this one,

[@ericstalker7973]

I think you are on the right path of injector problems. Once you have the intake out of the way you can do more testing on the injectors to verify. Thank you for this video,it was very informative to me. And yes Chevy has a nice injector flow test you can do with a manual fuel pressure tester. I believe the test you did in the injectors compares how much flow drops fuel pressure in a given amount of time.

[@KStewart-th4sk]

Apparently, you missed it somehow or didn't watch the video through to the end. He isn't taking the intake out of the way because the customer wants to change injectors himself.

[@Jethu262]

I struggled to diagnose an entire bank misfiring on my 07 Dodge Ram 1500 for months. It had strong spark in all coils, good compression, good fuel pressure, all new spark plugs. Eventually, just for shits and giggles I put my finger on the cylinder 2 fuel injector and couldn't feel a definitive pulse. I did the same with other injectors and felt an obvious tick. The #2 injector had been replaced while I was trying to figure out a no start condition. Good thing I kept the old injector, because I put it back in, and the lean condition and entire bank misfiring went away. The new injector was no good, and it was starving the other cylinders of fuel. She purrs like a kitten now.

[@ihavethedocuments2580]

New injectors can be defective right out of the box depending on where you get it. I see techs complain about this too.

[@Jethu262]

@@ihavethedocuments2580 yep, I learned a LOT trying to figure out the issue...first and foremost....new doesn't always mean good...second, it isn't always the obvious solution. I was looking at a lean condition, but didn't think it would be due to an injector that was stuck open.

[@1MiketheMechanic]

You can show the scope patterns when it comes back in running worse because the customer put amazon specials in it.

[@samgage2294]

Thats was a roller coaster ride. sweet vid

[@joewallman2664]

Interesting video. Helpful insights for me

[@emilysuvac8243]

Best educational video ever

[@gladarambo4898]

Great video as always!

[@WanderingRobotStudio]

This kind of pre-diag video is great.

[@nogascansable]

Good read on the failing injector, and with age of vehicle, best advice would be to replace set. One question though: Assuming this is a port fuel injected V-6 ( and mileage/age) , how much possible impact would any fuel deposits on intake port/valves have to with cylinder to cylinder/overall performance in this case?

[@texasboy9701]

lol @2:35 guy in the background is digging for gold😂😂😂

[@raymundomiranda7853]

Can you guys show us 1 with a CODE P0300 and keep up the good work.

[@benb4688]

Would have been a great one to show the tailpipe misfire analyzer on the escope (iea). The other thing is if fuel trims are being corrected it shouldn't actually be running lean since the trims are not maxed out. Might have been able to see it under a snap throttle better.

[@rodvan-zeller6360]

I look at tail pipe lambda reading, if lambda is 1 +or- 2% there is no fuel control issue.

[@philh9238]

Wouldnt it been easier to do a cylinder power balance test see the weak cylinder? Maybe amp clamp the injectors and look at the pintle bump and see if one sticks out from the rest?

[@jeremyalbert2069]

Look at the basics , first , compression , good , contribution, misfiring all over the place , check fuel pressure, is air filter restricted , skewing maf ? Is it low on oil/ oil very dirty ? Changes variable valve timing ! Make it run rough . Is the egr sticking open at low speeds ? Might see a lean condition if that's happening ? Is intake leaking ? Smoke it . Ohm out injectors , common for them to fail on that engine , pull plugs and look at them, . Start with basics first , then move on

[@drbsr1948]

where's the link to the blue probe?

[@DependableAutoTruck]

forgot to say great job i always pick up some pointers from each video. I do have something i would like to run by you have customer with jeep ac leak the only place i can get buzzer to go off is transmission dipstick hole. that being said top portion of condensor is transmission cooler bottom is condensor it it possible to have a pinhole where letting freon pass. the only way we found it was this jeep doesn't have stick you have to use test stick and scanner to check temp while checking a/c customer said while we are checking would like to get me to check trans fluid the other tech was still checking for leakes when i screwed out the plug on the trans filler tube the leak dector was fairly close to it was checking fittings to firewall tester went wild closed tube and leake dector stopped but the two systems are tied together in the condensor never heard of this before. we checked another jeep at shop it didn't do it i will video if i get the job

[@johnpaulgarrett1]

Fantastic diag!

[@NS-YT-PV]

Sherwood I think you could have saved some time identifying the cylinder in question faster by throwing a pulse sensor in the exhaust (like the first look sensor but I’ve had plenty of success with my cheap Rotkee pulse sensor) and then scoping a sync ignition on whatever COP is easy to get to. I’ve had tremendous success with this method. You’ll notice on the pulse sensor that the cylinder in question that is misfiring will cause a steep drop in the pulse sensor waveform. You can do it with the WPS500 one its sensitive setting too but I know you’re not a pico guy and the WPS is overkill when a $20 pulse sensor works fine. Let me know if I can explain it better. This is effectively the dollar bill test but with actual data. Also if you need a download for a piston overlay software to line up the cylinder strokes with the ignition sync, I have an app I wrote that’s on my channel. It’s free and I wrote it for myself to use and shared on the AutoNerdz forum. I’m just a DIY guy with old cars who hates when stuff is diagnosed wrong so I’m in too deep now. Love your channel. Also if you want me to send you a picture with notes on it to show you what I mean, I have a case study of this exact diagnosis on a 2003 Honda pilot with bad injector flow on cylinder 5. Somehow fuel trim didn’t show the misfire because of both banks having only 1 upstream o2. Had to get fancy haha. I can send the waveforms and all. Just let me know

[@MsFireboy2]

Sherwood Fuel Injector Balance test.

[@OPTIMUS6LTR]

this

[@b.marvel6091]

Alright, I still give you credit, but you made me spend 20+ minutes of my life looking at a lean pulse...,I know my pulse, but if that's how you diag, so be it, just don't let others believe in keep watching and there's a definite answer

[@KGauto_Diagnostics]

Sherwood, where can I source that adaptor for the propane cylinder to barb fitting / vacuum line? I would love a hand held version like that. Im using the touch head currently, the idea of having a hose with a cone tip seems much better.

[@9502silverado]

I'm curious as to why you wouldn't look at the cylinder contribution first before looking at ignition wave form?

[@darrollfryer628]

I am having a hard time finding the link to the blue probe that you used Can you possibly tell me where it is

[@rodvan-zeller6360]

At 3:00, nothing wrong with your approach of replacing the sensor based on the propane test, everyone has different approaches, in these cases I look at part numbers, if same I swap sides and retest, paranoia.

[@rodvan-zeller6360]

At 12:29 one plug wears out the center electrode the other the ground electrode, we used to joke about rotating spark plugs to double the life span lol

[@DrennanBuiltRacing]

Sherwood quick question for ya only because I’m a rookie at the scope so because cyl 5 waveform was showing lean but not crazy lean tell you that the injector was firing just not delivering enough fuel? I have a habit of overthinking and going down rabbit holes and would have checked for injector pulse

[@MsFireboy2]

So Injector number 5. In selling the job I would recommend all 6 injectors due to labor costs. Your thoughts?

[@marvinpostadan3484]

Agree!

[@ChrisTew-w6y]

Depends on injector cost, never hurts to mention it for cya but if the injectors are 800 a piece I probably wouldn't.

[@philh9238]

Topdon is always missing the relative injector flow test on fords I used it on

[@thisisyourcaptainspeaking2259]

My shortcut to locating a dead cylinder is an optical thermometer.

[@RobertD-y42]

I am surprised scope and scanner companies aren't using AI to process the information these scopes capture. The tool could diagnose the problem automatically. Companies in the medical scanning field are already using AI to do this.

[@stevestadnik9206]

It's all fun and games until AI recommends a frontal lobotomy lol

[@sheerwillsurvival2064]

Love joes wand 👊🏻

[@rodvan-zeller6360]

At 17:23 the tail will show very well on a rev.

[@wrenchingvids]

What tablet are you using there?

[@rodvan-zeller6360]

At 9:10, how much gas in the tank? On some vehicles if below a quarter of a tank the engine controller disables misfire detection.

[@andrew7202]

I feel like an ignition clamp is better for wires instead of a paddle type

[@thebaldmechanichardatheari1124]

Good diag. For sure it needs injectors.

[@sheerwillsurvival2064]

Great video 👊🏻

[@martyisabeliever]

What Tool is the tablet?

[@KAS_Motorsports]

Someone messed with the wiring harness and crossed the #5 & #1 injector plugs?

[@rodvan-zeller6360]

Would like to see the scope on the fuel rail pressure sensor signal wire. Thank you for considering it.

[@AlexTardiff]

Are 1 & 5 companion cylinders?

[@martinarrieta248]

Grasias

[@BAJARACER43X]

ATS scan tool

[@anthonybuonagurio-gl9bg]

No man buns

[@MarkVanTasell]

ISOLATOR BOLTS...VERY COMMEN ON THE 4.2L..THESE HAS A 2 PIECE INTAKE,THE LOWER BOLTS HAVE RUBBER GROMMETS THESE FAIL(WHY DID IT CHANGE ON THE SCALE....WHEN IT WARMS UP THEY SEAL A BIT....HOPE THIS HELPS YALL

[@KAS_Motorsports]

Does that have the VLOM?

[@KAS_Motorsports]

Both banks would tell me it’s probably cam phaser

[@KAS_Motorsports]

Downstream O2?

[@AmericanSCPO]

Of course, the client isn't right. You could have a PHD. in car mechanics, metallurgy, engineering, and be a master mechanic, and the shop mechanic will insist you don't have a clue about how a car or an engine works. It's just to complicated for you to understand.

[@wrenchposting9097]

The client is at the shop for a reason. ;)

[@mph5896]

Owner could not figure it out. He can swap parts, but cant diagnose it without shooting the parts cannon at it.

[@HYBRIDEVMASTERSGARAGE]

Thanks for the Deep Dive Diagnosis 🙂 Btw '' Could You do the Diagnosis for FREE with the Repairs!! asked My - Customer. Let's Educate '' Today's Customers - Mindset ''

[@sheerwillsurvival2064]

Yeah thanks for rubbing in that I didn’t win the tool 🫤😉

[@drbsr1948]

where's the link to the blue probe?