How expensive a scanner is needed for this level analysis?
@NineInchTyrone3 күн бұрын
Techs shd make 100k +
@NineInchTyrone3 күн бұрын
Whew. Just go to med school !
@tonyfremont3 күн бұрын
It shouldn't reach 5psi of back pressure at full throttle.
@SomeoneSaid-nu6qdАй бұрын
Fantastic educational video.
@rodvan-zeller63602 ай бұрын
Great video. The biggest problem I have ran into were ignorant employers that accused me of wasting time when reading diagrams.
@abdouallahuniverse56892 ай бұрын
Fuel trims sometimes are not accurate, meaning not real, caused by defective or aftermarket or dirty or old OEM MAP or MAF sensors, like mine, the MAP sensor, which causes both fuel trims to be at 12 to 14 percent. I thought that I had a vacuum leak, but it was the aftermarket Delphi MAP sensor reporting wrong air flow or air pressure to the ECM, I just put back the OEM sensor and the fuel trim went down to 5 percent. I couldn't believe it, almost 10 percent extra, unnecessary fuel was injected into the cylinder, I don't know why oxygen sensors didn't report rich condition? And now I installed new OEM honda Denso bought from eBay, and the fuel trim went to zero percent now, sometimes 1 percent, sometime minus 1 percent sometimes 2 percent. I couldn't believe it. The initial issue was rough idle and sometimes engine misfire, and fibration, but it was the ignition electric connection wires that were loose at the aftermarket start button system. Basically, I created the problem over time by using a bad quick disconnect connector. I replaced the connector, and the problem partially solved: rough idle and misfire, but the fuel trim problem got fixed by installing the old OEM MAP sensor back.
@chuemoua68342 ай бұрын
Good explanation! One of the best I’ve ever heard
@MultiYourWish3 ай бұрын
Hello i just got Check engine light and in diagnostic system said P30EF INTERNAL RESISTANCE. whats wrong?? infiniti Q50S Hybrid can some1 help me?
@RobertBee-fs8hv4 ай бұрын
Your display resolution is terrible why di you feel onligated to sho your upper bidy in the video that criwds the image of the wave form screen
@juanlazar89454 ай бұрын
Bloody interesant, 😮😮😮
@Arthur-sz7uf5 ай бұрын
Great video.! Very informative. Thanks again..!
@DirtyWorm125 ай бұрын
I had one of these, it was kinda fun to figure out, it was cool to see it diagnosed differently
@ronaldmahoney12836 ай бұрын
Dropping the drivers side exhaust should have been all you had to do to determine the problem!
@nowayjose5966 ай бұрын
What's the difference between the PCM operating in closed loop with a fault vs open loop? If it's no longer listening/responding to the O2's input and just using stored values, isn't that just open loop?
@rogerbrandt66787 ай бұрын
So what is a p17?
@rogerbrandt66787 ай бұрын
Shit that’s easy, anybody that doesn’t know that should not be a mechanic,,,,,,,,,,lmfao shit man this is complicated. Big thumbs up and new sub here.
@kojohammond85317 ай бұрын
Very educative, pray to see more on troubleshooting modern electronic vehicles, including hybrids.
@billsullivan88127 ай бұрын
2008 Ford ranger V6 vulcan engine . LTFT Bank 1 was running negative -.8 at idle , would not change. LTFT on Bank 2 at idle was 9 percent. Drive down the highway both long term fuel trims were within acceptable limits, but press more on gas pedal #1 LTFT got more negative and # 2 LTFT got more positive. Checking the number 1 catalytic converter oxygen sensor B1S2 with the truck fully warmed up , it was found the sensor was exactly duplicating the upstream sensor, switching from .2 to .8 volts. Number 1 catalytic converter was obviously no good and partially obstructed as well.
@johnmitchell89258 ай бұрын
Glorified nissan designed to break
@johnmitchell89258 ай бұрын
Sounds like you way over complicated this
@ephraimmanyaka10209 ай бұрын
Iv got same car and it was on front accident steering airbag popped the car can't start meaning the emergency shut off was activated..how can I solve this?
@bluedeckelectronics9 ай бұрын
Good ! Thank you !
@abdul-kabiralegbe566010 ай бұрын
I was smiling ear to ear while watching this video. That's how good the diag, info and presentation was. Absolute masterclass!
@jesusjaimevargas292811 ай бұрын
Excelente class 😊 😊
@meblake735911 ай бұрын
Why didn't you show a known good transmission so that we can follow your conclusion?
@johnmitchell8925 Жыл бұрын
The scan tool is the first thing that should have been hooked up
@robertmobileman8304 Жыл бұрын
great video , well presented and much appreciated , thanks
@ThunderbirdRocket Жыл бұрын
Super beneficial lesson ! I learned lots of new things !! Thanks mate !!!
@ThunderbirdRocket Жыл бұрын
Watching it again ! This is GOLD !!
@douglasmontgomery6315 Жыл бұрын
Great job John !
@vickenkaragozian2041 Жыл бұрын
The same as Bernie thompson video on Nissan 370z. Great video. Thank you John
@spirokattan3655 Жыл бұрын
John, Another Amazing case study and lesson. Thank you for sharing!!
@gebentech3915 Жыл бұрын
Great Case study!! Thanks.
@automotiveseminars5110 Жыл бұрын
Glad it was helpful!
@IamReadyToRock Жыл бұрын
increíble
@romanjaspe4172 Жыл бұрын
Interesting, thanks so much Mr thornton 👍
@romanjaspe4172 Жыл бұрын
Interesting!, Thanks so much
@billcarrick889 Жыл бұрын
I'm a new Comer to automotive diagnostics and I have to say you are the best teacher or this industry hands down. Thank you.
@PineHollowAutoDiagnostics Жыл бұрын
Best automotive diagnostic lectures and case studies, thank you John Thornton!
@bashdavid92235 ай бұрын
I wondered where the best learnt from!
@ThunderbirdRocket Жыл бұрын
Fantastic tutorial ! Thanks !!!
@bookoobeans Жыл бұрын
For anyone still reading comments on this video: If the O2 sensors are easy to access, I wonder if it would have been more efficient shop practice just to screw in a pressure gauge and compare the banks this way?
@AutoDiagnosticsPK2 ай бұрын
Yeah, its done like that to diagnose exhaust restrictions
@val3nt1n000 Жыл бұрын
Great video!Thanks for sharing with us!I am wondering if you can share with us what brand of scanning tool did you use?Thanks once again!
@BigDogDiagnostics Жыл бұрын
Great information here! Thanks for sharing John!
@clintonadams5006 Жыл бұрын
Good for learning electronic controls being old school would been using mechanical gauges vaccum compression and exhaust pressure, oh never assume previous Diagnostic been their more often than needed.old dog learning new ways.
@junbefit5482 Жыл бұрын
God bless you John I have a 2013 m35h with a bad relay fuse1 and this video assured me that I was on the right track.
@jibranbaloch7650 Жыл бұрын
Nice
@vickenkaragozian2041 Жыл бұрын
Awesome John. Waiting to purchase your new online classes. Great presentation & great explanation.Thank you very much.
@trxtech30102 жыл бұрын
Good video. I have the issue with my 98 4.3 S-10 and everyone says what the las guys says is "Cloggged Cat, Bad Fue Pump, Bad Spider injectors, bad 02 Sensors etc" yet I have replaced allll oofff thoseee.
@scientist100 Жыл бұрын
Same issue with fuel trims bank to bank? Be sure to reset trims after detaching the cat.