The MYSTERY Mercedes - Part 4 (Thanksgiving Special)
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- Опубликовано: 7 авг 2024
- Who's ready to hear this old Mercedes RUN???
I need to get it off my lawn haha
Are your guesses from Part 3 going to be correct?
What is the recipe for success?
MERCEDES WAGON PICOSCOPE WAVEFORMS:
drive.google.com/drive/folder...
DIY WOOD STOVE TO WASTE OIL CONVERSION:
• Easy Waste Oil Heater ...
Enjoy the happy ending!
Happy Thanksgiving!
Ivan 
Авто/Мото
Enjoyed this 4 part series very much! Keep up the great work 👍 question, which ECM did you end up using, the original computer or the replacement?
It's running on the original! Owner said that he will probably keep the spare since he owns two of these wagons 👌
@@PineHollowAutoDiagnostics did you ever try to see if the car ran on the new ecm to see if it indeed needed programmed at all?
@@BoweryPenguin8 Mercedes was a little bit ahead of the game gearing up for the OBD 2 standard in 95. So, the ECM software is paired to the BCM and TCM of that particular car. Because each one may have different functions and features. So, simply swapping an ECM from another year car with a similar engine is a huge gamble if it will even run at all. But I can guarantee that it won't run correctly. And I'm fairly certain that those ECM's can't be reprogramed to work in a different car.
That was going to be my first question.
@@PineHollowAutoDiagnostics thought the drivers for the injectors were blown when they got fed 12v.
This was a great series my friend. I applaud your persistence! Working on old car is not easy. Lack of info and no scanner pids. A lot of techs would have just walk away from it. Congrats you are an amazing technician.
Maic, I really appreciate the compliment coming from a Euro specialist like yourself! Cars like this definitely make you a better problem solver... most newer cars with fast scan data then seem much easier to diagnose 😅😁
That was quite the adventure! One thing I always say to anyone firing the parts cannon in hope of solving a problem, if the new part you put in does not solve the problem, put the original part straight back in. Otherwise, and this case is the perfect example, you could easily be introducing yet another fault into the system. And then even if you do manage to solve the original problem, the car still may not run because you introduced yet another fault with a previous component you fitted.
Precisely correct 👌😁
The best advice I've ever heard 😃
Amen! Only change one variable at a time - the likelihood that your problem is a result to more than one failed part is extremely small.
We used to call it “shotgunning” in my old A&P mechanic and air force days. Also, with anything old always start with connections/wire condition. I wish I had a nickel for every problem I fixed by replacing power plugs and/or cleaning board contacts in my old biomed tech days. I took the simple approach with me when I saw the future and went to nursing school. Keep it simple stupid.
@@damiangrouse4564 You are correct sir, another old A and P mechanic here, we would pull back the black box and re insert back into rack or rerack and that cleaned the pins on the connector, as we only had 30 min. turn times, lol
Ivan, this was one of the BEST that I've seen you do, and I've watched almost all of your vid's. Your patience is amazing. You deserve to feel ecstatic about this case. I hope you got well compensated for all the hours you put in on it.
"The dark side of diagnostics." A great line for a marvelous and thorough diag, and repair. Well done young lad...well done.
Thanks Paul! This one was quite the trip 😄
Great job figuring out the stone age Mercedes diagnostic LED flasher!!! Dinosaur level, but it still does what it's supposed to!
In my best impersonation voice of one who will remain nameless as it triggers a few of your viewers...."This was the best diagnosis ever, possibly the best diagnosis in the history of diagnoses!" I recall in the first video you mentioned the crank sensor as being "one that would work" and was worried about that CKP, and the associated code, the whole time. Good work! It's tough to come in behind someone after the parts cannon has been fired like that.
Spot-on impersonation 👍. I concur.
Great detective work, Ivan. I don't think I'd have had the patience to sit there and count the light flashes every time you had to read the codes!! Yikes!
Good thing I charge by the hour 😂
In the best Maury Povich imitation of “You ARE the father”, sir you ARE the man!! Your patience and detective car diagnostics work is truly a gift from God! Amazing!
Moving it with the Suzuki was the funniest thing ever. "Look, it drives, and you can barely see the strings!"
And pulling it up that steep hill looked like a MOOR video :-)
@@henrydunbar397 hah 4x4 Low Range did the trick... Pretty sure the Mercedes weighs more than the Suzuki 😂
I liked that clip as well. Reminds me of an old drag racing joke where a racer "claims" that his crappy car does 10's, and someone yells, "Yeah, with an 8 second tow truck!" 🎶rimshot🎶.
Ivan snatches victory from the jaws of defeat, was there ever any doubt, great job
Makes you wonder how this diag would’ve gone if Ivan wasn’t dealing with an incorrect crank sensor along with the coil issue, that can certainly send someone on a wild goose chase lol
@@2491kridge I'm guessing if it was just the coil wires, this would have taken a couple hours... One hour to learn to read codes, and one hour to set up the scope and see why there's no spark 👌
@@PineHollowAutoDiagnostics the parts cannon missed badly this time Ivan
@@Alfran-yh4oowhat's a parts cannon?
I am impressed with the patient and the logical approach to complete this diagnostic
Ivan, You are the St. Jude (patron saint of lost causes) of auto repair.
This was like solving a murder mystery. Great video
ive owned Mercedes cars for over 30 years now and i have learned , Always have your Mercedes serviced by a Mercedes specialist. Never ever skimp on servicing regardless of age
# on the money.
MB changed these looms under warranty...
Apparently the "Mercedes specialists" in the local area couldn't figure this one out lol
@@PineHollowAutoDiagnostics It has to be said a lot of folk only want to repair current stuff.
An M104 engine should be much quieter than this one btw...and should pull much much harder from a standing start.
Great series btw...this biodegradable wiring loom was an EEC great idea...its not just Mercs that have this btw
Awesome diagnosis and fix Ivan! Glad that you got to sort out the correct part for the crank sensor! Indeed, parts between body models are different even if they look similar and having the correct part numbers will definitely get the correct results. Thanks also for sharing the after fix data, at least we all get reference for that.
On the engine knock, these engine run hydraulic lifters and having sat down for a long time, these hydraulic lifters bleeds down. So new and thinner oil will definitely help, just need to drive it hard to get it to circulate properly and fill up the lifters. Worse case, is to get all the lifters out and prime them up manually and re-install. Done these a couple of times and has fixed similar problems.
Cheers!
Ivan, everyone has already said it: A marvelous diag! Just marvelous. I couldn't wait for each succeeding video, Wow, what a ride.. You deserve all of the accolades for this particular job. This is one diag that you will NEVER forget. It is one for the ages. Thanks for taking us along. We'll be standing right by your shoulder as you dig into the next one. :)
Thank you for the motivation, Michael! Will not forget this one ever haha
Awesome Diag and repair!!!!!
Loved this series, was impatiently waiting for the conclusion! Had some experience with a 95 Mercedes Diesel sedan, I remember that engine wiring harness doing the same thing. I think it may have been mentioned, but I heard that Mercedes was trying to make the harness biodegradable for environmental reasons, I guess it worked too well.
The waveform is inverted from the AM Sensor. I was thinking that a couple videos ago when you mentioned a different part number and year. The OEM matched the spec waveform from ALLDATA. Tough find and great case study. As you know, this is how car makers make more money, part numbers, much appreciated IVAN.
that feeling of accomplishment makes it all worth it
I had a feeling it was the butler, er 86 crank sensor, all the time! 8-)). Gr8 job Ivan!
Pine Hollow Towing & Recovery
That poor old gal sounds like an old VW that needs a lifter adjustment. Nice and quiet inside, though! SUPER detective work!
All I can say is Dang. 😀 You have to truly love that car to go through that. The geek in me had to watch the whole thing. Great example of multiple issues and being dedicated enough to sort a car with led diag.
Ivan, you are a very very talented electronic technician. Your expertise with perseverance to correctly troubleshoot and fix issues that dealerships, repair shops, and DIY give up on because they run out of parts to keep loading their cannon or their ability is not deep enough to adequately troubleshoot the problem. 👍👍👍👍
Best repair I have seen on Mercedes of that vintage. Engine harness on 95 E class and S class cars had that problem with engine harness insulation degradation. Reason was trying to make the components of the car more recyclable and environmentally friendly. I can't tell you how many of these harness we replaced at the dealership. This problem started about 3 to 4 years into the service life of the car. First symptoms were misfire and rough idle. Best repair I have seen not having to replace small engine harness. Got so bad we kept the harness in stock for this problem.
Hey Ivan, from one technician to another, that was an awesome video, really impressive and well done.
Much appreciated, Chris. Glad you enjoyed it 👍
Its always interesting sorting out a problem when " someones been here". Catching those wires was very skillful though.
Absolutely loved this long session
Thank you.
Reminds me how much I liked the simplicity of my very s/hand 300 D back in the late 80s.
I think the inversion of the small spikes is caused by the correct reluctance sensor having a built-in permanent magnet with one orientation of polarity, while the 96 model sensor has that permanent magnet oriented the opposite way. This results in the small variable reluctance spikes being inverted, while the large synchronization spike retains its orientation with both sensors, as it is caused by a separate, fixed magnet on the shaft, and the spike it causes is independent of the magnet built into the sensor itself. Tricky Germans...
I reckon you have that 100% correct. Can't be electrical polarity since the sync pulse stays the same.
Makes me wonder if it would have worked to reverse the wires.
@@jimcrane6862 Switching the wires would invert the whole signal, the small spikes would be 'right way up', but you'd also invert the big spike, which would mess the signal up (again). The issue is the magnet orientation in the sensor. Switching the wires reverses the sensor coil orientation, which results in *all* pulses being inverted. The sensor magnet only affects the small spikes (caused by gear teeth only, not the separate sync magnet on the shaft which makes the big spike).
What you have to wonder though is what possible technical or even economical advantage might they claim for one polarity over the other? Maybe one less transistor in the ECM? That's all I can think of right now.
@@InsideOfMyOwnMind I think this is what happens, a new team of engineers comes in to design the electrical system for the new model year, in something like Fusion360 the junior guy drags in a coil and magnet from a template, since from an electronics point of view the magnet orientation doesn't matter, you just have to program the software accordingly (detect rising edge/falling edge). In the previous guys computer the default orientation was N-S, in the new guys it's S-N. He drags it in like that, and boom, the circumstances are set for the new behavior. There doesn't seem to be a list of things like 'lets try and carry these basic parameters over to the new design' to ensure commonality, as it serves no purpose. Commonality might even case more confusion on the service end if there is ambiguity that one part may be unofficially compatible with something it wasn't meant for. They certainly weren't planning to use old component stock, and when you're designing a new model, it's much easier starting from the ground up, than having countless constraints to 'try and use components we already have lying around' and trying to fit them or make them work...
Awesome diagnosis! The satisfaction of getting this beast fixed must be incredible!
A picture is worth a thousand words.
WOW I missed football, parades, and most of Thanksging day watching this young man do his magic. Time well spent. Happy Thanksgiving to all and to all a good turkey.
Tricky sensor twist at end - impressive persistence.
I stayed up late watching all the episodes......I don't think I would have the patience to 'stay with it' as you did !!! You are really an excellent diagnostician. Very impressive ...thank you
Thanks Robert! I lost a bit of sleep on this one as well haha
This Turkey is like my left over Turkey that keeps😄 on giving for 4 videos. Very nice and well done!
That was truly EPIC! Thanks, Ivan.
Hi, Ivan, thanks for doing the before and after.
I wasn't just seeing things...👍👍👍👍
Goes for a rip in a Merc: "V-TEC kicked in!" Absolutely love it.
😅
I have a customer with a similar issue on a 95 Mercedes sL500 but I think it’s a crank sensor adjustment/distance from pickup issue. Problem occurred after transmission replacement. Great special Ivan!
Or it could be bad wire insulation. The wire harness were disturbed during the transmission swap.
Use the scope to check the signal!
So, car drove in and it's a "crank/no start" after trans R&R? Do YOU suspect CKP got damaged? Or, did shop replace flexplate for some reason? Many flexplates can bolt on, but only ONE is correct. Junkyard will give you wrong one in a heartbeat. Double check with MB, but I think 1995 uses flexplate with 4 reluctor segments and 2 magnets, NOT the 60-2 type. Also, if it is 4+2mag type, be sure magnets didn't get lost somehow.
Awesome all good suggestions. It’s been a “when I can get to it” job but next step is scope ckp and make sure the flywheel I installed was the same as the one I removed. I have a feeling it is not. I am not looking forward to removing the transmission again but it’s all nuts and bolts in the end!
@@blueskiesmobileauto4253 Definitely use the scope to 100% determine if you have to do 10 hours of manual labor :))
I said it before and I'll say it again. Ivan, you are the rock star of off the way diagnostic challenges. Fascinating work buddy...
I have a 1996 Jeep XJ that needed a temperature sensor which I ordered. When I installed it, it wouldn't plug in and at that point I learned that my 1996 has a 1997 wiring harness and rear differential. It is the little things. You have taught me a lot. Thank you.
This guy !! Our here making people smile !!
Your work is top notch !!
I've watched so many of your videos I'm beginning to turn into you. My granddaughter wanted to play Nintendo Wii but it wouldn't work. Several hours later I finally found a nylon gear was just spinning on the shaft and wouldn't load the CD. A little crazy glue and back in business. NPR......I hope you and your wife had a great thanksgiving!!!
I agree with Juergen Scholl that reversing the wires on the computer would fix the wrong sensor. Schmidt trigger circuit is usually employed to detect these pulses and they are slope dependent. Reversing the wires would reverse the rise and fall slopes of the pulses. This is the electronic reason the '96 sensor didn't work. John Smith also had a good explanation but I suspect schmidt trigger requirements is the real answer to this fix. I mention this for future problems where a schmidt trigger circuit may cause confusion about the waveforms. Good video!
Very cool! Good thing that the parts cannon fodder was still in the car haha
If the wire insulation is actually bio-degradable why do the wires away from an extreme heat source appear good? This particular insulation does break down with excessive heat as demonstrated. Maybe the term bio-degradable is a misused term for this insulation. I have experienced other modern wire insulations break down with excessive heat also. The wire location confinement on the top of the cylinder head is a serious heat source problem without doubt for any wire. I admit my ignorance on Mercedes maintenance issues. I will agree that engine heat is the most likely beginning of this problem (not some water ingest that I wrongly referenced in a previous reply).
@@ForTheManDIY actually those same wires looked just as bad at the ECM away from the heat 😅
Well done Ivan from the UK but your bill will be more than the car is worth!!
Ivan, your patience and perseverance is off the scale! I watched all four videos and firmly believe most techs would have thrown in the towel and gave up a long time ago around vid 2. My hats off to you for your diagnostic skills and never ending quest to find and get to the root cause of a problem. Your videos are a pleasure to watch and follow! You sir need to be teaching automotive diagnostics in a trade college somewhere!
Hmmm, Dark Side Diagnostics kinda has a ring to it. Killer case study Ivan. Thanks!
I said Hummmmm when you mentioned the customer said the sensor had been replaced with one that should work in Part 1. OUTSTANDING troubleshooting video!
Your patience and persistence are amazing!
Well done Ivan. Perseverance for the win. Once again the parts cannon sends us down a rabbit hole. Thanks for sharing.
Hope you and your wife had a great Happy Thanksgiving many thanks Ivan and a big hello from Australia :)
excellent work !! these shops now a days just want to throw the kitchen sink at something ( parts cannon ) & when it doesn't fix it
they tell the customer that there to busy to fool with it anymore !!
BUT , THEY THEN CHARGE THE SNOT OUT OF THEM FOR A " NON RUNNING CAR " JUST THE SAME !!!
GREAT VIDEOS , I HAVE PICKED UP A LOT WATCHING YOUR CHANNEL , KEEP THEM COMING !!!
gotta say, from a diagnostic stand point, that was pretty good, i liked the little LED light, that was cool
Excellent Ivan, some fuzzy logic needed, or not!.
Brilliant diagnosis and repair.
Thanks for sharing.
Nice work Ivan! This is my favorite case study of all that you've done. Your expertise and persistence pays off again.
Ivan is saving the environment, one junker at a time out of the landfill.
BRAVO, PHAD 👍. This case study is right up there with "The Best of Bernie" 😉.
I would love to see Bernie tackle this one!
Fascinating series. Eric O probably has one of the oil filter wrenches. He loves European cars.
Awesome job! When these cars were much younger than this one, many an MB tech would fire the parts cannon at them, installing new engine bay wiring harnesses, sensors, and head gaskets if they were out of warranty just to make sure the customer wouldn't end up stranded somewhere. Big bill, but probably prevented a lot of headaches down the road.
Fantastic work, Ivan. You are a true automotive engineer. I don't know how many folks could have done what you did to repair that car. You have distinguished yourself as the best car repair channel on RUclips!
I also have a 1995 W124. 98k but still original harness. Always garage kept, but this will help in the future. Love this channel!
I feel like a kid in the kid in a candy store! I get super excited when I see you post another video!! When I saw the little Suzuki roll backwards in the Mercedes roll backwards in the scene I thought the Mercedes was going to win the tug of war! Lol Great video Ivan!!
What a finish
Ear to ear grin just before you cranked it and i believe my stomach started to cringe a little
I tip my 🎩
Me too 😂
Just when i though ivan wouldn't get a known good crank wave form, bonus footage to the rescue 🙂
Ivan, great job! You have an amazing amount of patience combined with incredible tenacity, I don't believe a normal mind would go the places yours goes. Thanks for Sharing!
We do not celebrate Thanksgiving here in the UK but I always look forward to the occaision because you always have something special. Yet again a great series of videos once again for this year.Thank you
My pleasure!
Just cause it fits doesn’t mean it’s right!! Say no to parts canon! Resist and diagnosis first! Great German case study Ivan. Almost as good as NPR
No way. When I saw the harness I was done. Great job.
U can give thanks too owners of cars who luv to pump oodooles of dollars in to old vehicles that should be scrap by now, so u can do a holiday case study, once again u are proof that ur tenacious testing will out, thanks for posting
To charge that much for a coil (inductor) sensor is extortionate !! Very nice series Iven, you are not only very talented in fault finding, you what to understand these faults and why, keep it up !
Ivan, you are definitely the greatest person in finding out the problems, and not only on cars , but other devices as well. Love your videos. Keep on working 😁😁
It all seems so simple once we know what the problems are. What a road to get there, though! This was a great series! Not what I was expecting at all, as far as the cause of the no start. Goes to show, you got to stick with the correct part number when it comes to parts, especially electrical parts ... and especially on German vehicles!
Ivan for the win!! Well done.
Great job, Ivan. It's too bad; it knocked right away.
Every moments viewing an inspiration. A very well done from me, congratulations, again.
Excellent Job Ivan.. that one was a head scratch-er for sure. Glad you got to the heart of the matter.
Hi Partner! 2 Thumbs up on you NOT giving up with cases such as this and you remind me of my younger self.....I always said to my customers, "If it CRANKS, I'll make it run". As a Master Technician of 42 years, I have come to realize that GOOD Techs, such as ourselves, are a dyeing breed. I have thoroughly enjoyed watching your videos. Sorry for not commenting until now. Hope you are doing well. Feel free to respond to me anytime as I am still on this side of the dirt and will continue this/my career until ?????.....Love it so......Hope to hear from you sometime......Sincerely, Phil>R&DInfrasystems......
Man, you never say quit! Great use of the best diagnostic tool that there is: the brain! Many thanks for the waveforms, will help me in my search to be a better picoscope user!
I had a '89 300 TE in the UK, it was a great car. Passed everything but the gas station.
Boy oh boy - it’s the old story though, the job is much harder if someone else had a try and failed and as soon as the parts canon has been fired then run for cover !!
Amazing!!.. Ivan
There’s still hope with old foreign vehicles.
Where others will deny or ship, you’ll take on the challenge & succeed
You really need a couple extras: 👍👍👍
A very interesting case indeed with 2 surprisingly uncommon failures at once.
Thanks for you video series !
It's a known flaw for over a decade now engine wiring harness's degrade on that era and series biodegradable wiring harnesses from 1991-1996, resulting in electrical problems caused by the insulation crumbling away over time. a physical check before hooking up any electronic whizz bang stuff would have saved you hours of work...been there and done that!
You shouldn't get under the car without jack stands. Great job on this series!!! I would leave that coil cover off, for the heat to get away from those wires.
Its hard to complain about a straight six for smoothness and torque. Interesting that this repair found the main problem first then still didn't run and that new crank sensor was responsible. That will prove to folks that its rather important to use the correct part numbers unless the manufacture has an updated part number. The german cars are very strict on their required parts, my guess.
I thought when you finally got ignition (Yay!) that you would break into a spirited Barynya!
My mechanic feared the 90's MB all because of those crumbling cable insulators..
He said just a shorted headlight cables can cause "wonders"..
Well done Ivan... This 4-part video was worth the watch.. i am not a mechanic, but I own an old Land Rover so now a hobbyist wrench-tender.. Well done, and thanks...
I had one 'crank but no start' drive me nuts for the longest time after proving the crank sensor was bad, installing a new sensor... turns out I made a bad assumption that AC signal generating sensors don't have polarity... new sensor had two black wires. My luck, given a 50/50 shot at getting it right, had the wires backwards.
I've come across such a problem on motorcycle engine. Having cranck sensor polarity reversed made the thing backfire or even like trying to run in reverse. Unstable ignition timing made me think that the control module was going bad.
Great series of videos Ivan, I remember making a wiring loom for a 1992 W140 SL600 because of the same issue. A real pain even for an experienced auto electrician, but we do what we do to get the job done. The S class of that era was cutting edge and even then had drive by wire and 2 fully motorised throttle bodies, 2 engine computers that ran in parallel because 1 engine ECU could not handle the processing power to run 12 cylinders - if 1 ECU went down the car would still run on 1 bank independently. - cool ....
You have done a great job.. Well done and thanks..
Thanks. Remove the sensor , extend the tip with an 6 inch iron rod and point at the pole of a compass, you have just identified the internal magnet polarity so now you know your replacement should do the same attract / repel of the compass pointer
Started having imports in the 80's come in for service when car companies started merging. Had to fabricate tools to work on them until we received our special tool request. Still have some of them. Ahhhhhhh the memories
Thank you Ivan. Btw, when the original crank sensor fails put the other one in and just cross change the wires in the ecm, it will fire up......8-) Close to the Ford design where the engine will not start with these wires swapped WITHOUT setting a code. On a trailblazer with the 4.2l, 6cil. inline it's similar.
I agree that reversing the wires on the computer would fix the wrong sensor. Schmidt trigger circuit is usually employed to detect these pulses and they are slope dependent. Reversing the wires would reverse the rise and fall slopes of the pulses. This is the electronic reason the new didn't work.
That was a great case study and you definitely have the patience of a saint. I don't think I could have hung in that long without getting super frustrated.
Lol those Germans can put up a good fight! How's the pressure transducer working out?
@@PineHollowAutoDiagnostics I have not gotten a chance to use it yet but will hopefully soon. My beater 92 Cavalier is going to be my first test dummy for it. It's had a rough idle for years and it's not fuel or ignition related I don't believe since over the years I have fired the parts cannon at it quite heavily for both of those systems and back before I started to actually learn how to start diagnosing this kind of stuff. I believe it's possibly something mechanical with the cylinder head since it sounds kind of funny through the exhaust at idle. I had one of the spark plugs loosen up on it years ago during cold weather and it has run like this ever since that. I did do a relative compression test on it recently and the wave form looked normal. It runs fine at higher rpms. It's possible it has a vacuum leak but all of my rudimentary checks for that have not turned up anything.
I think that was the best diagnostic series I have ever watched. Excellent job Ivan. I really enjoyed it, and I`m not even a tech!!!
Wow thank you for the kind words John,glad you enjoyed it 👍
Enjoyed this series! Thank you for bringing us along.
Glad you enjoyed it 👌
Hats off to you and your methodology...watched the whole escapade!