Wrench Tales #2: Rick Urso
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- Опубліковано 1 жов 2024
- We are back with the second edition of our brand-new video series, “Wrench Tales” with Technical Editor Brandon Steckler! In this video, friend and automotive expert Rick Urso (of Hi-Tech Auto Specialists, in Chicagoland,) shares with us a diagnostic story of perseverance.
Rick was faced with a 2012 Acura TSX that would exhibit an “extended-cranking“ condition that only seemed to occur on the coldest of mornings. What made the vehicle such a diagnostic nightmare is that the fault only occurred at a rate of once or sometimes twice per day! That’s right, Rick many times had one opportunity to capture data over a 5 second period. After that, he was forced to wait an entire day for the next opportunity (but, only if the weather cooperated).
Watch and listen as Rick tells his story and shares the data he saw, beginning from the driver’s seat, with the scan tool. Witness Rick’s logical approach to capture the data that proves the PCM has everything it needs to create proper outputs (at the ignition coils and fuel injectors). It was this same logic that led Rick to ignition waveform analysis and ultimately discover the root cause of the issue to be poor fuel injector spray pattern.
This was a very illusive and difficult fault to discover. And, if not for the foundational knowledge, proper tooling and skillful analysis of captured data, this problem would’ve slipped right past him. Tune in to this episode of wrench tales and see if you have what it takes to properly analyze and diagnose this vehicle!
#Hitechautospecialists #Wrenchtales #Motoragemagazine #Motoragetraining #Thedatadoesntlie #Diagnostics #Labscopediagnostics #Driveability
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I can’t believe information like this is free. As a tech I really appreciate these types of videos. Thank you 🙏
Thank you so much for stating that. We appreciate you as well.
Yeah it’s a real treat . Well said / good word . Seriously .
@@ThunderbirdRocket , Thank you!
What a great case study! Seeing the videos comparing the old injectors vs new is a great teaching tool.
Thank you so much!
You mentioned in the video at one point ”we don’t like to think of ourselves as scientist but in a way we are…”
You absolutely are in every sense. I am a scientist for a living and I can tell you that what makes a scientist is the proper application of scientific method to narrow down to only a single variable. Only proper experimental design can ever do that and that’s exactly what you are doing here- and what good techs do every single time.
it’s absolutely 100% science. it doesn’t matter if it’s in a laboratory testing drugs on rats, or if it’s a technician systemically determining the cause of a no-start, or even a plumber determining the cause of a humidifier that isn’t working. As long as a scientific procedure is done creating positive and negatives controls to allow for a single independent variable that can either be ruled out or confirmed as a cause- it’s science in every sense of the word.
Thank you!
Absolutely masterful! I cannot express my gratitude enough. At 67, having wrenched since the 70s I consider myself a “paid professional learner “ in the words of Jorge from AES Wave.
Except I don’t get paid any more but I volunteer my expertise at my churches Car Care Ministry.
I can literally study and practice while diaging all day. Much of time is spent in a wheelchair bc of illness but wrenching gets in your blood. No matter how many wrenches or parts you throw across the shop in frustration you always come back. Blessed
Nice 👍🏼 ! 🕊
Very well presented. Thanks to you both.
Thank you for watching!
Thanks for sharing the case study. Another great example of following the basics and letting the data drive you to the conclusion. As always observation and interpretation is key to the success. Keep practicing and keep collecting known good scan data and scope wave forms. Gotta know good to be able to recognize bad 😁👍
You got it!
Great case study , well presented, thanks for the lesson and your time
Thank you!
Neat case study, I'm on a similar one right now. One more cold start, and a couple more tests before I pull the rail. I'm trying to rule out air in the rail before I check spray pattern. Only 1 chance per day to test sure cramps your style! 😎
Good luck!
04 Mazda mx5 with a bad cam phaser had a no start. I didn’t get degrees off but it was 2 seconds off cam/crank signals at 285 rpm cranking. Other technician did the head did not know the dowel should have been in the phaser not the cam.
I remember a tip from Bernie on how to address the diagnosis using the fuel trims, I can corroborate that here. Incredible. The video needs subtitles but I can still understand it. Thanks, from Peru
Thank you for watching!
@@brandonsteckler3417 Hey Brandon, on page 305 and 306 of your book, the images don't match the description in the text, right??? I had forgotten to ask you about that detail...
Tremendous video thanks for putting this together the both of you
Thanks for the feedback!
Boy do I remember the good old days of scope perades on single coils and distributors.
Hey. Fantastic video guys, thank you. Very educational and I learned a lot. I am pretty new to all this so forgive me if these are stupid questions and I missed it in the video. What I can’t quite grasp is how the cold conditions cause the results and why the engine runs fine after starting ? For example does the spray pattern change once the engine has started and immediately starts to warm up and if so is this a know phenomenon? Or once started does the spray pattern have much less influence over the performance and power output from each cylinder so effectively runs ‘fine’ for rest of day? Lastly why did it start all, is it it just that it is right on the borderline between long crank v no start? Thanks again and hope not wasting anyone’s time ! Cheers
Great questions!
Fuel must be vaporized to ignite. The cold temps allow more of the fuel to condense on the engine surfaces and can lead to the symptoms Rick experienced.
OBD1 DIAG APPROACH
FIRST ON THIS ONE FOR ME THE SNIFFER ON THE 4 GAS IS A POWERFUL TOOL FUEL IN THE OIL,
VAPORS AT THE PCV,RAW FUEL IN THE EXHAUST ONLY TAKES A FEW MINUTES 👍
OLD SCHOOL🎓 IF THAT DONT PUT ME IN THE RIGHT DIRECTION BREAK OUT THE ATS SCOPE AND TRY TO SPIRIT CHANNEL
BERNIE THOMPSON 🤣
LIVE AND LEARN 🤔
Thank you Brandon for this great case study Also I love the title a lot ..lol
Thank you!
Walking me dogs Bow and Arrow 🏹 in the forest trails & listen’ / LEARNIN’ with the BEST bros in the industry ! Perfect format to increase my understanding and confidence to tackle these tricky challenges . Thanks gentlemen !! 👊🏼 🔥
We are very pleased you are enjoying the new videos, thank you for the feedback!
Excellent video!
Thank you!
This is fantastic information! Seeing the components "at work" will give you the info that's needed to make a decision that lead to the correct repair!
Thanks to Rick for this information and to Brandon for bringing it to us.
Very much my pleasure !
Thanks for watching!
Put the battery in the freezer.
Injector cleaner would have saved you 28 days😂
It may have
I'm confused about the 720 degrees at time stamp 14:32. I'm assuming the top waveform is CKP, so I don't understand how it's 720 when it only goes from one wide section to another wide section. I'm also assuming the wide sections represent where the trigger wheel is missing a couple of teeth. I would think this is only 360 degrees of rotation of the crankshaft. Am I missing something?
Think 360 popped up in text, think it doesn’t matter here for his comparison that he chose 360 instead of 720. Still able to compare reference points
@@fastbagel Thanks, I missed that.
That was a mistake and we added text to correct for the same. However, the analysis is the same.
We are simply trying to define a cycle as a point of reference. We then use the cursors to measure the offset.
@@brandonsteckler3417 Thank you!
Rick ,what you used to scope the cop coils?
Rick used the capacitive pick up lead for secondary and a plug wire.
SHREWD, RICK URSO
THANK YOU VERY MUCH FOR SHARING YOUR KNOWLEDGE WITH US, 👍
SHREWD BRANDON STECKLER MOTOR AGE
BRILLIANT VIDEO TUTORIAL GREAT THANK YOU
I can't wait for the next video
From Nick Ayivor from London England UK 🇬🇧 ⏰️ 2303PM Good Evening
Thanks for watching, Nick!
Nice 👍🏼 ! Well stated !!
What really stinks, is when you see the fuel trims, then look at the potential carbon fouling plugs... And replacing them "FIXES" the problem.... For a couple of weeks. Then it comes back... Same problem, same symptoms. (Coolant temperature was reporting about 20°F too low)
Fuel trims should’ve reported that hint to you. When coolant temperature sensors are skewed "cold", the PCM increases injector duration. This strategy is in place to overcome fuel volatility issues from cold engine surfaces. Any inaccuracy in an input results in skewed outputs (in this case, an over-delivery of fuel). The end result should've been reflected as negative fuel trims (for both banks) under all operating conditions.
My approach would've ben to replace the fouled spark plugs and re-evaluate fuel trims. We must ALWAYS seek to repair the root cause of the driveability issue, not the result of the problem (fouled spark plugs).