Man I wish your shop was in my neck of the woods. It refreshing to see a guy that not only knows what they are doing but actually has a passion for it. Much respect for a business owner/operator that treats his costumers bikes like they were his own. Well done Mr. Baxter and thank you for sharing your hard earned knowledge.
Great detective diagnostic work Kevin. Takes tons of knowledge and patience to do this and you most definitely possess both of these traits! Not many would have viedoed this. You made it understandable and interesting. Thank you.
Fantastic demonstration Kevin. These are the challenges/mysteries many of us home mechanics/builders call the Gremlins… With the right amount of skill/knowledge/patience/tools you’ve just proven, once again, that any problem can be discovered. Thanks from Canada….love your vids.
And THAT is why I don't cringe at "exorbitant" labour costs... I have a pretty clear idea of the mechanical concepts involved in a combustion engine - but not a clue as far as the electronics aspects and diagnostics are concerned. Thanks for another fantastic video Kevin! I always find your explanations so full of detail, and yet still very simple and clear. You would have made a fantastic teacher! I've learned so much from your channel and I want to thank you for that. Cheers, from South Australia. 👍🇦🇺👍🇦🇺
Marvelous step by step diagnostic procedure!! As a technician in the railroad industry, I can appreciate your directed process! Throwing parts at a problem is easy, unless you are the one paying for it!!!
i'd like to see the "bad" sensor waveform. Great diagnostics video. So many techs (and people in general) think "read a code, swap a part". A code, or in this case lack of code, is merely a piece of diagnostics. thanks for sharing.
Now that’s what I like to see true diag on an issue that does not throw a code. Love these gear head troubleshooting issues as they can relate to all of us at some time in our troubleshooting.
Well done👍. Many shops and tech would have thrown new parts at this problem hoping to find the answer. Thanks for showing it is a step by step problem solving process that takes time and understanding.
I’m an electrical engineer and it warms my heart to see you use an oscilloscope. Most motorcycle mechanics have no idea what that is or how beneficial it can be. Good job.
Great video. Found a lot of problems can be solved with voltage gauge and checking grounds. But the frame is the ground. Have you ever checked? A car or truck all have engine ground for a reason. Engine mounts don't always ground out the engine. I ran a ground wire to starter and it fix starter lag. Plus it really seems to start and run better. And if engine is not grounded where does the current go? This is even more important with frames that use the engine as structural member like Buell, Pan Am, and Sportster S.
my brain nearly melted when you said, it wld not crank off starting fluid even w spark.. too many carbs in my life to immediately catch the FI system needs all that communication to 'time' it just right too ... great vid ty sir
Loved this video…I worked avionics on military aircraft for 42 years. Looks like a great deal of the technology marbles have entered the civilian market. Great in-depth explanation!
Thank you. I’ve have a bike that I’m working on that had all these same symptoms. I told the customer that it was the ecm and they insisted to change every else but the ecm. After sending them this video they agreed to tru it and bingo it fired up. I felt like you made this video just for me
I’m glad I found this video. Reason being is that I came across someone. that just bought an 05 Fatboy 2 weeks ago and it quit on him a day that it was 107 days egress here in Sacramento the other day. He didn’t have any diagnostic equipment on him but who does when you’re out riding? We tried everything for over 2 hours and I had to leave before his buddy y came to pick him and his bike up. But I’m going to call him tomorrow and see if he figured it out and tell him about your video. Great presentation.
I really want to have this video playing for all of my customers to see when they ask why it cost so much for diagnostic repairs. Videos like this help breakdown all that’s involved with doing proper diag, and not just throwing miscellaneous parts at a bike, hoping to get lucky and find the problem.
we play topic videos here all the time when we know a customer is coming in having similar work done. this is one of the reasons i post videos...to let people see whats going on. many have said "pulling back the curtain".
Old school scope there. Another thing that can pull down the 5 volt reference is another sensor shorted or partially shorted. Typically 5 volt is shared among several sensors. Nice call on the ECM in this case. Nice thing to have a known good to prove it out 100 percent.
Another great video Kevin! I hate diagnosing electrical issues, that is definitely my weakest spot. I have two oscilloscopes in my attic that belonged to my dad. One is the old style with the round CRT display and the other is a little more modern, but still about 30 to 40 years old. I have no clue as to how to even use them though.
So basically the discombobulator was all dukemflached!!🤷🏻♂️😂Great video and education would love to see you do some more work on a 88B because that’s what I have.I hear there great platforms for builds.Thanks again.👍🏻🍺
As usual very informative! Great content! Thanks for sharing your knowledge. I recently had a no start issue with the 98 Heritage I bought. Didn’t know where to start. Turned out to be ignition switch.
Thanks for another great video Kevin. Interesting to watch you work your way down the diagnostic path and arrive at a correct conclusion. I hope I have similar success diagnosing the starting system on my '85 FXRP. Battery tests out good, but the motor won't turn over fast enough to start it. Will be using diagnostic procedures from the service manual. NOT gonna throw parts at it yet!! Don't fret if you don't do a video every week. It's not like you don't have anything else that needs doing.
Scopes on a Harley. I have a 4 channel Micsig I use for equipment diagnostics. I definitely want to scop my bike to get known good captures of the signals on my 23 ST SG. Nobody is doing this that so know of but it’s common practice in the automotive world. I’m interested in synching up the crank notch to MAP readings while idling for tuning purposes.
You also need to disconnect everything on the 5 volt circuit in order to discount any shorted components. If you see 5 volts with all sensors disconnected, either test each sensor or connect them one at a time until you see the voltage drop. Of course this is after verifying grounds etc. If you still see under 5 volts then the ecm is cooked. I run into these issues often.....it usually takes about 2 hours to diagnose and without an oscilliscope...just using a plain ole dvm.
Excellent information as usual! It's fascinating to see the process of what I would call deep dive diagnostics, and to get a glimpse of what the "brains" of these electronically controlled systems are thinking during various malfunctions. Greatly appreciate everything you do to keep us informed and educated!
Very much so. I been watchin a lot of the twin cam videos. Gotta 2012 blackline with a stage 1, 103b. Planning on going stage 2. Basic riding, nothing to hard. Just want reliable and get out of the way power. Great videos.
Thanks brother✊ Customers don't always understand the hourly rate we charge in regards to the work performed. Essentially in my opinion and experience you are paying for the work essentially but you more importantly are paying for the knowledge and experience as well . Best regards Mr Baxter.
Sometimes I like my points, condenser, flyweight advanced, kick only, carbureted shovelhead with the hot wire on the coil being held there with an alligator clip.
I can't recall how many Evo bikes I've seen stranded with 6VDC going to the ignition coil. I learned a simple fix from a longtime MMI instructor that's gotten people up and running in a snap. Supply power directly to the coil from the battery. I'm curious if someone was stranded and they managed to jump 5VDC to the CKP if it would've fired up. Hat's off by the way for demonstrating a oscilloscope.
Kevin: I really like, enjoy and learn a lot from your videos. The step by step tear-downs and parts upgrades complete with tips and explanations gives me a lot more confidence that I could do at least some of these projects and repairs myself. Happy that you are getting into problem solving videos although I have to say that this first effort was mighty obscure. I haven't carried a scope since I retired eons ago. And swapping an ECM based on a hunch would be cost prohibitive for me. I completely understand that technical explanation for how you got there and I appreciate that a lot. But for me, videos that isolate more common problems and fixes would be hugely helpful. As a reference, replacing cams is about the limit of my skill and available tools and I have yet to actually do that (yet). Keep up the great work and answer your messages :) Trying to buy a Daytona Twin tek controller from you and not getting a response :(
Hi Frank. It wasnt swapped on a hunch...the ecm didnt have 5v output to sensor...knew at that point it was ecm. Plugging in a known good one was just to confirm. Ill be doing all sorts of different videos in the future. Thanks for watching!
I hope the customer understands how lucky he got by bringing the bike to you, having the ability to diagnose the the problem correctly. To many people claiming to know what they're doing, would have just started throwing very expensive parts at it.
As usual, Great video! I like the subject and understand most of it, thanks to my son who works on new cars. But I will stick to what I know, carburetors, chains, points and condensers. Your scope reminds me of a Sun machine. Lol
Kevin, many years ago Daytona Twin Tec produced a EFI to Carb conversion module, to replace the Magneti-Marelli and early Delphi EFI system. Myself being an old "analog man", that would have been the route I'd have chosen. Great video as always. JP Jones "the old analog man" Lol
I had a friend years ago who was a great mechanic and a very passable electrician. He said he would rather deal with a mechanical problem than electrical. He Said the thing about electrical work is you may replace a part and it may run for awhile but then it fails and you realize the part you replace was just a symptom of a larger problem. Kind of like replacing a dead battery only to find the new battery is fried a few weeks later because the voltage regulator was shot.
Kevin, you're awesome and I love your videos. I refer many people in my country to your channel to learn from. That's high quality content right there. Thank you for all the effort you put into making this.
Make sense. Great video covering a common problem (bike won't start) with a strange twist. I can push start it, but won't start when using the electric start. My initial thinking when hearing the problem's discerption was what effect dose using the electric start have on the ignition. After watching the full video I believe I understand why that was happening. Seems like the low reference voltage is still enough for the crank sensor to produce an usable signal for the ECM proven by the fact they could push start the bike. But when using the electric start, when the battery voltage drops a couple of volts due to the load of the starter, I believe the reference voltage due to the bad voltage regulator in the ECM is also dropping more causing the crank sensor to produce a bad (noisy) signal that the EMC interrupts as the crank turning at a high RPM, which then dump excess fuel into the motor and all the other effects. It would be interesting to monitor the crank sensor's reference voltage during cranking and watch its signal with the scope. Maybe that's just me. Either way the EMC is bad due to a failed internal voltage regulator. Enjoy your video's and have learned a lot that's helped me with taking care of my own bike. Thank you.
Technology is great when it works. That is why I'll never have a new bike. Too much technology, too much to go wrong. Kev, thanks for being there for us when things go wrong. With me, it's got to be, keep it simple stupid.
I had a #4 pin die on a Daytona TwinTec ECM. Unit lasted about 4 years. Put my stock ECM back in and bought a MasterTune. Been running great ever since. Well that is until my 18 year old sensors started to die. LOL
Keep in mind, not Everytime but a whole lot of times in the automotive world one of my easiest first things to do is key on and look down at the cluster. One of the clues is to not see the check engine light come on. It's a clue that at times helps me with the path I choose in which to diagnose and verify.
Nice video, if you didn’t have a spare ECU laying around, next step would have been to verify you powers and grounds for the ECU - static, cranking, and koeo.
Great lesson Kevin. Being an electrician, this makes perfect sense. It seems obvious since you had the cps disconnected and read supervisory voltage was low, you had a bad ecm. If you had no voltage and CPS disconnected, will the sensor fluctuate ohm’s while the crank is turning to verify that the sensor is doing its job? Or does it just create a short to ground for shorter and longer periods to get it’s electrical cycles?
Generally, there are two main types of crankshaft sensors: Hall-effect sensors and magneto-resistive element (MRE) sensors. An MRE will create its own voltage (only has 2 wires) where a Hall effect has 3. Neither open or close a switch per se.
Ibeen working on a 13' rg"s" diagnosed bad ecm for same problem(no codes) held throttle forward and bam it started. Had to do that on few test rides finally it was back to normal. 🤔🤷🏻♂️. Bike battery did die completely before..
This may sound dumb but on the older freightliner semi trucks they had a watch battery in the ecm and would do that exact same thing so I would look at that before buying a new one but being that old it probably is a bad ecm
Hi Kevin-great example of an excellent approach in the application of best practice automotive diagnosis👏 Out of interest, if you didn’t have a spare Delphi ECM; and disconnected the 5V output from the ECM and applied an external 5V would that bike have started?
Please dont feel pressured to make a video a week , your videos are worth waiting for because of the quality Mr. Baxter . Thank you .
Thanks sir. Appreciate it. Will do my best!
Agree 100%. Were you a high school teacher. You explain everything perfectly with a voice that's easy to listen to. Thank you Mr. Baxtee.
Man I wish your shop was in my neck of the woods. It refreshing to see a guy that not only knows what they are doing but actually has a passion for it. Much respect for a business owner/operator that treats his costumers bikes like they were his own. Well done Mr. Baxter and thank you for sharing your hard earned knowledge.
this is so far beyond the old "set the points with a matchbook" days. fuel, air & spark, all at the right time.
Yes sir...i love me some points. Lol
Great detective diagnostic work Kevin.
Takes tons of knowledge and patience to do this and you most definitely possess both of these traits!
Not many would have viedoed this. You made it understandable and interesting.
Thank you.
Thanks 👍 Appreciate you
Fantastic demonstration Kevin. These are the challenges/mysteries many of us home mechanics/builders call the Gremlins… With the right amount of skill/knowledge/patience/tools you’ve just proven, once again, that any problem can be discovered. Thanks from Canada….love your vids.
Cheers Denis! Thank you!
Kevin this was awesome. It addressed content that to my knowledge has never been broached.
Thank you sir. Glad you found it useful.
And THAT is why I don't cringe at "exorbitant" labour costs... I have a pretty clear idea of the mechanical concepts involved in a combustion engine - but not a clue as far as the electronics aspects and diagnostics are concerned. Thanks for another fantastic video Kevin! I always find your explanations so full of detail, and yet still very simple and clear. You would have made a fantastic teacher! I've learned so much from your channel and I want to thank you for that.
Cheers, from South Australia. 👍🇦🇺👍🇦🇺
Im with ya Grant! Thanks!
Great explanation on that I’m in the automotive world and diagnostic is half the battle I’ve spent days on trying find one bad ground
Intermittent drivability issues are the worsr!
Marvelous step by step diagnostic procedure!! As a technician in the railroad industry, I can appreciate your directed process! Throwing parts at a problem is easy, unless you are the one paying for it!!!
I always like to know the why.... parts are expensive!
This is my type of shows!!! Keep with the good work! Thanks again for the that slice of wisdom 💪
Youre welcome Dirt. Thanks!
Absolutely the best explanation of the best range of content!
Wow thanks Fred! Appreciate it!
Big fan of the diag videos! Very informative and perfect explanations. Thanks for sharing!
Great! Thank you Eric!! Appreciate it!
i'd like to see the "bad" sensor waveform. Great diagnostics video. So many techs (and people in general) think "read a code, swap a part". A code, or in this case lack of code, is merely a piece of diagnostics. thanks for sharing.
In this case it wasnt bad. If it were, the pulses would be flat, intermittent, or none.
Excellent description and demonstration! Now to change the ECM and get the proper tune re-loaded for that engine combo....
Yes Sir!
Now that’s what I like to see true diag on an issue that does not throw a code. Love these gear head troubleshooting issues as they can relate to all of us at some time in our troubleshooting.
Theres more to modern stuff for sure. Same concepts, but more parts. Thank you!
Well done👍. Many shops and tech would have thrown new parts at this problem hoping to find the answer. Thanks for showing it is a step by step problem solving process that takes time and understanding.
At first it seemed to be crank sensor. 1 extra step said otherwise. Thanks!
Just spoke with Jason a few minutes ago about a rebuild on my 95 EVO and wanted to say you are fortunate to have him with you...
they did my 95 evo fatboy i will say that you will NOT be disapointed in the work ,mine runs great and is very dependable
I couldnt agree more! Thank you so much!
Great video. Knowing how to properly troubleshoot shows the difference between a great shop and an average shop.
Glad to help. Thank you
Amazing knowledge you have. This is why paying a professional is worth it.
In any field sir, i agree!
I always look forward to your videos. Makes me almost wish I were a fly on the wall of your shop!
I’m an electrical engineer and it warms my heart to see you use an oscilloscope. Most motorcycle mechanics have no idea what that is or how beneficial it can be. Good job.
Great video. Found a lot of problems can be solved with voltage gauge and checking grounds. But the frame is the ground. Have you ever checked? A car or truck all have engine ground for a reason. Engine mounts don't always ground out the engine. I ran a ground wire to starter and it fix starter lag. Plus it really seems to start and run better. And if engine is not grounded where does the current go? This is even more important with frames that use the engine as structural member like Buell, Pan Am, and Sportster S.
Outstanding explanation / demonstration.
my brain nearly melted when you said, it wld not crank off starting fluid even w spark.. too many carbs in my life to immediately catch the FI system needs all that communication to 'time' it just right too ... great vid ty sir
Yes sir. Not much different than spinning a distributor 180 out. Timing is everything.
Loved this video…I worked avionics on military aircraft for 42 years. Looks like a great deal of the technology marbles have entered the civilian market.
Great in-depth explanation!
Thank you sir!
Thank you. I’ve have a bike that I’m working on that had all these same symptoms. I told the customer that it was the ecm and they insisted to change every else but the ecm. After sending them this video they agreed to tru it and bingo it fired up. I felt like you made this video just for me
I bought a dynateck ECM, not the fix.
I’m glad I found this video. Reason being is that I came across someone. that just bought an 05 Fatboy 2 weeks ago and it quit on him a day that it was 107 days egress here in Sacramento the other day. He didn’t have any diagnostic equipment on him but who does when you’re out riding? We tried everything for over 2 hours and I had to leave before his buddy y came to pick him and his bike up. But I’m going to call him tomorrow and see if he figured it out and tell him about your video. Great presentation.
Love videos like this where you can actually learn from it.
Appreciate that. All the best
Now that's troubleshooting at its best 👌 great video sir
Thanks DJ! All the best!
Unbelievable deductions. I would have never figured all that out I learned alot.
I really want to have this video playing for all of my customers to see when they ask why it cost so much for diagnostic repairs. Videos like this help breakdown all that’s involved with doing proper diag, and not just throwing miscellaneous parts at a bike, hoping to get lucky and find the problem.
we play topic videos here all the time when we know a customer is coming in having similar work done. this is one of the reasons i post videos...to let people see whats going on. many have said "pulling back the curtain".
Please do more of these diag videos. This was fascinating to watch.
Will do my friend!
I agree @@KevinBaxter
Thank you for sharing knowledge.
Your ability to articulate a concept is immense.
Old school scope there. Another thing that can pull down the 5 volt reference is another sensor shorted or partially shorted. Typically 5 volt is shared among several sensors. Nice call on the ECM in this case. Nice thing to have a known good to prove it out 100 percent.
Yes sir! Same here...5 volt to all but not all are shared. 2.5v to crank, 5 v to all others in this case.
Another great video Kevin! I hate diagnosing electrical issues, that is definitely my weakest spot. I have two oscilloscopes in my attic that belonged to my dad. One is the old style with the round CRT display and the other is a little more modern, but still about 30 to 40 years old. I have no clue as to how to even use them though.
Thanks Chris! I appreciate your support!
Hi Kevin I've never owned a Harley davidson until I turned 60 odd. I welcome your videos so much thankyou Terry from Australia
Cheers Terry! Glad to have you!
So basically the discombobulator was all dukemflached!!🤷🏻♂️😂Great video and education would love to see you do some more work on a 88B because that’s what I have.I hear there great platforms for builds.Thanks again.👍🏻🍺
Lol....the early to mid year TCs were great bikes.
Thanks Kevin, Very interesting and informative video, great content!
Very concise! Thanks a bunch! Never too late in life to learn something new. Keep up the great and helpful videos!
thank you!
As usual very informative! Great content! Thanks for sharing your knowledge. I recently had a no start issue with the 98 Heritage I bought. Didn’t know where to start. Turned out to be ignition switch.
Intermittent issues can be quite a challenge as well. Thanks!
Thanks for another great video Kevin. Interesting to watch you work your way down the diagnostic path and arrive at a correct conclusion. I hope I have similar success diagnosing the starting system on my '85 FXRP. Battery tests out good, but the motor won't turn over fast enough to start it. Will be using diagnostic procedures from the service manual. NOT gonna throw parts at it yet!! Don't fret if you don't do a video every week. It's not like you don't have anything else that needs doing.
Another great video Kevin ! Keep up the good work !
Thank you Rob!
I love how you drill down all the way on this one. I’ve gotten to the point where I know “x” is bad but this is actually proving I!!
Awesome technical skills! 👍 interesting to watch your videos. Thanks!
This is a very well produced video and much respect for Kevin's knowledge and skills.
Every video you post is very detailed and informative!
Great channel!!
I appreciate that! Thank you sir!
Great video! I would love to see more diagnostic videos just like this!
More coming! Thanks!
You Sir are an absolute engine genius. Hats off to you. Can't wait to get my bike in with you for my build. Thank you for sharing your knowledge.
Scopes on a Harley. I have a 4 channel Micsig I use for equipment diagnostics. I definitely want to scop my bike to get known good captures of the signals on my 23 ST SG. Nobody is doing this that so know of but it’s common practice in the automotive world. I’m interested in synching up the crank notch to MAP readings while idling for tuning purposes.
You also need to disconnect everything on the 5 volt circuit in order to discount any shorted components. If you see 5 volts with all sensors disconnected, either test each sensor or connect them one at a time until you see the voltage drop. Of course this is after verifying grounds etc. If you still see under 5 volts then the ecm is cooked. I run into these issues often.....it usually takes about 2 hours to diagnose and without an oscilliscope...just using a plain ole dvm.
Great video Kev, you explained that really well………….every day is a school day.
thank you sir!
Excellent information as usual! It's fascinating to see the process of what I would call deep dive diagnostics, and to get a glimpse of what the "brains" of these electronically controlled systems are thinking during various malfunctions. Greatly appreciate everything you do to keep us informed and educated!
Glad you enjoyed it! Thank you sir!
Way-to-go, you're a great teacher
Appreciate it Wayne. Thanks for watching!
That was a great video. I really understood what you were saying. Had no idea It takes all that to run. I really learned something new. Thanks 👍
Glad it was helpful!
Very much so. I been watchin a lot of the twin cam videos. Gotta 2012 blackline with a stage 1, 103b. Planning on going stage 2. Basic riding, nothing to hard. Just want reliable and get out of the way power. Great videos.
Excellent video, and thank you for sharing your expertise with us!..
Great information!!
Glad you enjoyed it. Thank you!
Thanks brother✊
Customers don't always understand the hourly rate we charge in regards to the work performed. Essentially in my opinion and experience you are paying for the work essentially but you more importantly are paying for the knowledge and experience as well . Best regards Mr Baxter.
Ecm was my guess when you mentioned the spike on it at 7000 rpm.
Excellent content, troubleshooting is my favorite.
I had it being a timing issue while listening to you eliminate the choices...👍
Well, to some degree you are right, it was! ECM sees 7000 rpm....so it pushes timing to full advance accordingly. Good catch!
Sometimes I like my points, condenser, flyweight advanced, kick only, carbureted shovelhead with the hot wire on the coil being held there with an alligator clip.
I can't recall how many Evo bikes I've seen stranded with 6VDC going to the ignition coil. I learned a simple fix from a longtime MMI instructor that's gotten people up and running in a snap. Supply power directly to the coil from the battery. I'm curious if someone was stranded and they managed to jump 5VDC to the CKP if it would've fired up. Hat's off by the way for demonstrating a oscilloscope.
Kevin: I really like, enjoy and learn a lot from your videos. The step by step tear-downs and parts upgrades complete with tips and explanations gives me a lot more confidence that I could do at least some of these projects and repairs myself. Happy that you are getting into problem solving videos although I have to say that this first effort was mighty obscure. I haven't carried a scope since I retired eons ago. And swapping an ECM based on a hunch would be cost prohibitive for me. I completely understand that technical explanation for how you got there and I appreciate that a lot. But for me, videos that isolate more common problems and fixes would be hugely helpful. As a reference, replacing cams is about the limit of my skill and available tools and I have yet to actually do that (yet). Keep up the great work and answer your messages :) Trying to buy a Daytona Twin tek controller from you and not getting a response :(
Hi Frank. It wasnt swapped on a hunch...the ecm didnt have 5v output to sensor...knew at that point it was ecm. Plugging in a known good one was just to confirm. Ill be doing all sorts of different videos in the future. Thanks for watching!
Wow this vid was super informative. And you told it in a very understanding way. Thank you for your time 👍👍
I hope the customer understands how lucky he got by bringing the bike to you, having the ability to diagnose the the problem correctly. To many people claiming to know what they're doing, would have just started throwing very expensive parts at it.
I have searched and search this video I have the same exact problem with my 2001 Electra Glide you are the man thank you so much
As usual, Great video! I like the subject and understand most of it, thanks to my son who works on new cars. But I will stick to what I know, carburetors, chains, points and condensers. Your scope reminds me of a Sun machine. Lol
Just a lot smaller! Lol. Thank you sir.
Great lesson... Cheers.
thanks. Cheers!
great video Kevin 🤘⚡🤘✨✨
Thank you so much!
Kevin, many years ago Daytona Twin Tec produced a EFI to Carb conversion module, to replace the Magneti-Marelli and early Delphi EFI system. Myself being an old "analog man", that would have been the route I'd have chosen. Great video as always. JP Jones "the old analog man" Lol
That was awesome. Some great things learnt from this video mate.
Thanks
Always learning so much here...true value and high quality videos. Thank you for making them
My pleasure! Thank you
I had a friend years ago who was a great mechanic and a very passable electrician. He said he would rather deal with a mechanical problem than electrical. He Said the thing about electrical work is you may replace a part and it may run for awhile but then it fails and you realize the part you replace was just a symptom of a larger problem. Kind of like replacing a dead battery only to find the new battery is fried a few weeks later because the voltage regulator was shot.
exactly. thank you sir!
Kevin, you're awesome and I love your videos. I refer many people in my country to your channel to learn from. That's high quality content right there.
Thank you for all the effort you put into making this.
Make sense. Great video covering a common problem (bike won't start) with a strange twist. I can push start it, but won't start when using the electric start. My initial thinking when hearing the problem's discerption was what effect dose using the electric start have on the ignition. After watching the full video I believe I understand why that was happening. Seems like the low reference voltage is still enough for the crank sensor to produce an usable signal for the ECM proven by the fact they could push start the bike. But when using the electric start, when the battery voltage drops a couple of volts due to the load of the starter, I believe the reference voltage due to the bad voltage regulator in the ECM is also dropping more causing the crank sensor to produce a bad (noisy) signal that the EMC interrupts as the crank turning at a high RPM, which then dump excess fuel into the motor and all the other effects. It would be interesting to monitor the crank sensor's reference voltage during cranking and watch its signal with the scope. Maybe that's just me. Either way the EMC is bad due to a failed internal voltage regulator. Enjoy your video's and have learned a lot that's helped me with taking care of my own bike. Thank you.
Yes sir....agreed. Just enough voltage drop.
Electrics are complicated,nice walk through, well explained.
Thanks my friend!
Technology is great when it works. That is why I'll never have a new bike. Too much technology, too much to go wrong.
Kev,
thanks for being there for us when things go wrong.
With me, it's got to be, keep it simple stupid.
Pros and cons Jerry for sure! Love me some points and carbs too! Thanks!
I had a #4 pin die on a Daytona TwinTec ECM. Unit lasted about 4 years. Put my stock ECM back in and bought a MasterTune. Been running great ever since. Well that is until my 18 year old sensors started to die. LOL
Thanks Kevin,I need all I can get,love your vids can't wait for the next one.
Youre welcome Roger. Thank you.
Keep in mind, not Everytime but a whole lot of times in the automotive world one of my easiest first things to do is key on and look down at the cluster. One of the clues is to not see the check engine light come on. It's a clue that at times helps me with the path I choose in which to diagnose and verify.
Nice video, if you didn’t have a spare ECU laying around, next step would have been to verify you powers and grounds for the ECU - static, cranking, and koeo.
very true. i could see from the data that i had power....but for demonstration you make a great point. thank you!
Awesome video, love the diagnostic info.
Thanks. More to come!
Were would be if not for your special tutorial. Love your work 👍
Thanks Stephen!
Clear as a bell now. That was a Great Video.
Thank you sir
Very informative thread. Thanks
Really interesting video to watch!
Glad you enjoyed it
Very informative video, thank you
Youre welcome. Thanks for watching!
Great lesson Kevin. Being an electrician, this makes perfect sense. It seems obvious since you had the cps disconnected and read supervisory voltage was low, you had a bad ecm. If you had no voltage and CPS disconnected, will the sensor fluctuate ohm’s while the crank is turning to verify that the sensor is doing its job? Or does it just create a short to ground for shorter and longer periods to get it’s electrical cycles?
Generally, there are two main types of crankshaft sensors: Hall-effect sensors and magneto-resistive element (MRE) sensors. An MRE will create its own voltage (only has 2 wires) where a Hall effect has 3. Neither open or close a switch per se.
Fascinating Kevin! Thanks.
Thank you.
Ibeen working on a 13' rg"s" diagnosed bad ecm for same problem(no codes) held throttle forward and bam it started. Had to do that on few test rides finally it was back to normal. 🤔🤷🏻♂️. Bike battery did die completely before..
great keep those diagnostic vids coming👍
More to come! thanks
Fascinating!
I enjoy the problem solving aspects. Thanks!
Great info!!!
Wow , very well done and articulated clearly , Thanks .
This may sound dumb but on the older freightliner semi trucks they had a watch battery in the ecm and would do that exact same thing so I would look at that before buying a new one but being that old it probably is a bad ecm
Oh memory lane...lol. i recall batteries in ECMs...way back. Thanks!
Awesome info brother
Glad you like! Thanks!
Hi Kevin-great example of an excellent approach in the application of best practice automotive diagnosis👏 Out of interest, if you didn’t have a spare Delphi ECM; and disconnected the 5V output from the ECM and applied an external 5V would that bike have started?
Great info 👍🏍️
Thanks! 👍
Great video. Love this kind of stuff.
Thank you!
Nice job! Thankyou for this video!
Thank you too!
Great Video Kevin, very interessting.
Appreciate it Michael. Glad you liked it.
Thanks that was extremely useful apritiate your knowlage
Thanks Tommy!
Thank you very much for sharing. Learning a lot !
Thanks for the support sir!