Thanks for the feedback. If I was born 20 miles from where I live now, you might not be able to understand me 😂. UK Accents! Great to have you on the channel.
Rather refreshing to learn from a person with brains. To the point, no babble, and important info not missed... Basically, you show how to avoid to buy an expensive scanner, with subscription. You have the fortitude and grace to provide reel markers in the description so one can copy them and make an index and go straight to the pertinent section directly when needed. You are a cut above all the joes who crowd and cloud the Internet. Thank you ~
Thanks for the feedback, and glad you’re enjoying the channel! I also have a waveform library you can access and play with all the waveforms created in my videos. Great to have you on the channel 👍
Hello, i want to thank you for your whole production ! If is possible to donate your work somewhere i will not wait on anything and i will send some support for your work, its just cool and amazing, thank you and thanks to all same smart and inspiration people like you. This world needs smart people which have what to say and teach other people! Bless you man!
This is a very humbling comment, thank you! Currently I don’t have a direct method for donation, however I have some plans for the near future where you will be able to access more of me and my learning content in exchange for a small fee. Watch this space! Thanks again 👍
One of the best explanations that I've ever seen what happens in an electrical circuit containing inductance during the transient process. Maybe you should show in future how to test the electrical parameters of the injectors without oscilloscope and current clamp!
With every clip I watch I'm becoming more and more interested in buying that picoscope. Dude, the possibilities! Say you get a car that has that annoying ever-so-slight twitch every once in a while, indicating a misfire but not enough for there to be a DTC. Air leak? Bad spark? High temp? Injectors? Coils? This type of diagnosis, and combined with your other vid on how to test ignition coils, makes it sooooooooo easy to in, say, 15mins?, completely exclude the ignition AND fuel system directly above the cylinders. Amazing, no more half-arsed guessing. Just comparing each coil and injector. The moment I get that picoscope I'll be amp-clamping every single part I can get my hands on haha
Nice video, very educational sir. I believe the phenomena is called counter EMF that’s produced in a coil. Back EMF is produced when an AC motor is spinning creating voltage of its own. Just an FYI
Cheers, glad you enjoyed the video. I think there are many references for the same phenomena; this article looks at the relationship between self inductance, Lenz’s law and inductive reactance - all of which are related to the EMF you mention 👍 www.nde-ed.org/EducationResources/CommunityCollege/EddyCurrents/Physics/selfinductance.htm
I have watched (and DLd) of ton of your VERY informative tutorial type videos. Not sure if you're done a video detailing what is (and is not) important when thinking about getting an oscilloscope for a car mechanic. That would be great. Perhaps one video about the oscillator and one about the software from automotive perspective. Do cover the amp clamp too.
I think my next purchase needs to be a low and high amp clamps 🗜 your a bad influence! 😂😂 seriously though this is all good stuff! And I will look forward to collecting more known good waveforms off my own scope and cars. Cheers.
Hello from the US . I'm a lady master tech and I Love your videos! Another way I have been taught to test for misfires, is to test the power side fuse at the fuse box .If the coils or injectors are not accessible you can take out the fuse for either one and install a loop of wire with a fuse in its place , the current ramp all the injectors or coils to see if one is failing causing the misfire and put a trigger on it , like you would do with a RC test. You can also do a fuel pump the same way. A good video to make could be on testing with the mini amp probe at the fuse box on different things?
Cheers Denis, I was quite pleased with myself on that one 😁. Maxing out higher than expected was just because I put a resistor in parallel to the injector increasing the total current. I don’t think it would do that on a real short circuit, just the initial vertical current increase 👍
Hello my friend. I didn't know before that I could need such a clamp in way to repair my cars (haven´t had till today injectors problems) . Now that I'm watching your video, I might buy this thing. Or not ? Anyway , decided to subscribe to your channel . Cheers
Hello, really interesting video and helping but how can we explain the waveform of a piezoelectric injector from a diesel engine ? How issues are ploted in the actual waveform ?
From the video, you stated that the pintle hump on the current waveform means the injector pintle is open and the pintle hump in the voltage waveform means the injector pintle is closed. Do we need to use 2 channels when checking injectors?
To see these 2 events, they need to be checked with an amp clamp and a voltage probe. Separately. You could use one channel and do 2 measurements. But yes, this is 2 separate tests
Hey Darren, Great follow on from the last voltage/injector video. There is so much that can be learned from both the voltage and current waveforms run in combination. This includes the MOSFET & diode or zener diodes inside the ECU used to 'clip' the flyback voltage, which helps control the injector close rate. Well done on another brilliant video in the oscilloscope series! MiracleMAX 😁
What's your opinion, using the 6 way universal breakout lead's ? Is it good, by the mean, no back probing and make a damage to the loom? Do we have better connection (and waveform) ?
They are quite useful. Couple things to be careful of from my own experience. 1. If you are looking for a fault, removing the connector might affect the issue 2. Always check they are ok before you test, I have used faulty test leads in the past.
Hi, Why do you use an atheunator when testing the voltage and current of the injector when the maximum input voltage of the oscilloscope is 20 volts? Best regards
Hi, I only use the attenuator for the voltage signal (not the amp clamp). The spike goes up to about 120V. Sorry, I had the attenuator connected when I picked up the scope and didn’t make it clear it was for the voltage signal. I cover this on my last video, check it put if you haven’t already 👍
When the magnetic field collapses after the injector is turned off it induces a huge voltage spike that will fry a small scope like the 2204a. But it's a great scope, I use the same one all the time.
Hello. However, I bought a pico 2204a, i.e. with 1 \ 1 x 10 probes for trucks, the possibility of connecting 24v and a current clamp adapter may be useful. Hantek starter will probably be too weak? thanks for the help.
@@MechanicMindset to the probe to measure 24v is probably a choke needed. and the tongs will be an expensive thing. inrush current about 2300 amps. unless the starting current is not measured, Hantek 650 may be enough?
Really like your videos. I want to lern more. Did you recomend the Pico 2204A to start with? Or is it easier for a beginner with a more expensive scope? More help functions etc?
Hi, glad you’re enjoying the channel. To be honest, to a beginner the 2204a and the most expensive 4425a would appear very similar. I think the 2204a is a great starter and you can always sell it if you decide to upgrade. All the accessories can be used on any other Pico too 👍
What about the coils oscillations at the beginning of the amperage waveform, I see some vehicles have them and others don't. Is that something you look at?
@@MechanicMindset I was always taught that they're very significant as for addressing the coil/injector etc health. The start of building the magnetic field, technically the injector doesn't actually open until about half way up the ramp and after the injectors turned off there's still a small amount of fuel being delivered until the pintal is fully closed. Of course this happens in micro seconds. Just a thought, but I really do respect your videos. We're you using just a x20 attenuator for the voltage signal? I worry alot about damaging my scope (2204a) as well.
@@alanw5879 Haha, no; I already have the injector voltage signal connected on channel B when I presented the scope. A few people have asked that, I must be careful with that in future videos, could be misleading! 👍
Cheers! Yes a solenoid diesel injector is similar but might look quite different voltage wise. It also depends what type of diesel injector you are measuring; there are 3 main types used in the last 10 years that would all look very different to each other. Lots of questions on diesel so I will make a video soon 👍
@@MechanicMindset yeah! I have a 6.6L DURAMAX LGH V8 Turbo (diesel) Direct Injection in a Chevrolet Express 4500 mini bus, (14,200lbs vehicle)... it has the super duper $400(ea.) injectors. Will look for the video.
excellent. question: how would one interpret the slight short / initial vertica current spike that you explained toward the end? Is it indication of a failing/dying injector?
Inductance in a coil is the property that resists a sudden change in current flow, effectively limiting initial current flow while the magnetic field is building. That's what causes the normal current ramp to be wedge shaped. Normally when a coil is shorted, the insulation at one spot has melted to the point that current can go through fewer loops of wire before it finds a direct pathway to ground. With fewer loops of wire, the inductance of the coil is reduced, so the current ramp is steeper, more closely resembling the way a normal resistive circuit behaves.
Hi, I would start with the diagnostics. if you have an older oxygen sensor you can measure the signal voltage. The newer broadband oxygen sensors are more difficult to measure with a scope, you need a very sensitive amp clamp.
Just a question, if you connect the ground to a chassis ground on one channel while measuring a lamp, and the ground elevates at 0,1V because of voltage drop, is the second Channel, where a battery powered ampclamp is connected going to show something wrong?
Current will flow across the ground through the scope; you must not do this with a common ground scope. We did a video on this 👍 You need floating grounds for that.
Sure, amp clamp is connected to the oscilloscope via the BNC connector and I have clamped around the injector wire at the injector. Doesn’t matter which one 👍
@@pyrorenegade4983 No worries. In theory, you can connect an amp clamp anywhere on the circuit (I.e. live side, ground side, you could also put a loop at the fuse or relay and measure there)
Found you on mechanic lab scope Facebook had to sub good content keep it up you should look up bodget and legit on this his here in Ireland and does a lot with scopes
It baffles me when you look inside the clamp there's not much there. Why make it so bulky. Not to mention the jaws can't clamp on some battery cables. Lmao
The tiny jaws are very limiting! I’ve never opened it up. I’m guessing at one point the space was needed and they never re designed the body. There are a few brands using the same body design
big thank you just did my first injector amp ramp on my new 2204a pico scope i saw on your channel
Awesome! What else do you plan on scoping?
I appreciate how you get straight to the point every time and how well spoken you are
Thanks for the feedback. If I was born 20 miles from where I live now, you might not be able to understand me 😂. UK Accents!
Great to have you on the channel.
Rather refreshing to learn from a person with brains.
To the point, no babble, and important info not missed...
Basically, you show how to avoid to buy an expensive scanner, with subscription.
You have the fortitude and grace to provide reel markers in the description so one can copy them and make an index and go straight to the pertinent section directly when needed.
You are a cut above all the joes who crowd and cloud the Internet.
Thank you ~
Thanks for the feedback, and glad you’re enjoying the channel! I also have a waveform library you can access and play with all the waveforms created in my videos. Great to have you on the channel 👍
Hello, i want to thank you for your whole production ! If is possible to donate your work somewhere i will not wait on anything and i will send some support for your work, its just cool and amazing, thank you and thanks to all same smart and inspiration people like you. This world needs smart people which have what to say and teach other people! Bless you man!
This is a very humbling comment, thank you! Currently I don’t have a direct method for donation, however I have some plans for the near future where you will be able to access more of me and my learning content in exchange for a small fee. Watch this space! Thanks again 👍
Did you ever set something up? I will definitely subscribe!
Nice work Darren .
Glad you enjoyed the video Ian!
One of the best explanations that I've ever seen what happens in an electrical circuit containing inductance during the transient process. Maybe you should show in future how to test the electrical parameters of the injectors without oscilloscope and current clamp!
Thanks, glad you enjoyed the video! That would make a good video. Do Ditex offer any tools to help with injector diagnostics?
Ill be watching this later today. Thanks
Hope you enjoy!
With every clip I watch I'm becoming more and more interested in buying that picoscope.
Dude, the possibilities! Say you get a car that has that annoying ever-so-slight twitch every once in a while, indicating a misfire but not enough for there to be a DTC. Air leak? Bad spark? High temp? Injectors? Coils?
This type of diagnosis, and combined with your other vid on how to test ignition coils, makes it sooooooooo easy to in, say, 15mins?, completely exclude the ignition AND fuel system directly above the cylinders.
Amazing, no more half-arsed guessing. Just comparing each coil and injector.
The moment I get that picoscope I'll be amp-clamping every single part I can get my hands on haha
For sure! Very powerful stuff once you get in to it! The 2204A will get you a long way; and then you’re gonna want to upgrade for the 4425A 😅
Nice video, very educational sir. I believe the phenomena is called counter EMF that’s produced in a coil. Back EMF is produced when an AC motor is spinning creating voltage of its own. Just an FYI
Cheers, glad you enjoyed the video. I think there are many references for the same phenomena; this article looks at the relationship between self inductance, Lenz’s law and inductive reactance - all of which are related to the EMF you mention 👍
www.nde-ed.org/EducationResources/CommunityCollege/EddyCurrents/Physics/selfinductance.htm
I have watched (and DLd) of ton of your VERY informative tutorial type videos. Not sure if you're done a video detailing what is (and is not) important when thinking about getting an oscilloscope for a car mechanic. That would be great. Perhaps one video about the oscillator and one about the software from automotive perspective. Do cover the amp clamp too.
Great to hear! Yes I will do a video for buying an oscilloscope. I have done one video for the Hantek cc-650 amp clamp already 👍
Keep up the good work. Thanks for the feedback also. Great help
Excellent Darren. Many thanks.
Cheers
I think my next purchase needs to be a low and high amp clamps 🗜 your a bad influence! 😂😂 seriously though this is all good stuff! And I will look forward to collecting more known good waveforms off my own scope and cars. Cheers.
Haha, apologies! Get stuck in 👍
SUBSTANTIAL Mechanic Mindset
Tutorial great 👍 👌 👏 thank you
Mechanic Mindset
From Nick Ayivor from London England UK 🇬🇧
Great video Darren keep up with your great work 👌
Excellent explanation, very clear and helpful. Keep going
Glad you’re enjoying the channel. What would video would you like to see us create?
Thanks my friend great video. Keep the good work
Cheers Nidal!
Hello from the US . I'm a lady master tech and I Love your videos!
Another way I have been taught to test for misfires, is to test the power side fuse at the fuse box .If the coils or injectors are not accessible you can take out the fuse for either one and install a loop of wire with a fuse in its place , the current ramp all the injectors or coils to see if one is failing causing the misfire and put a trigger on it , like you would do with a RC test. You can also do a fuel pump the same way. A good video to make could be on testing with the mini amp probe at the fuse box on different things?
That last bit about a partial short, sharp initial ramp and maxing out higher than expected was really good Darren.
Take care:)
Denis
Cheers Denis, I was quite pleased with myself on that one 😁. Maxing out higher than expected was just because I put a resistor in parallel to the injector increasing the total current. I don’t think it would do that on a real short circuit, just the initial vertical current increase 👍
Yes, a lovely dual-function tool.
thank you very much superb video
Glad you enjoyed the video Stephane
Thanks for making these videos.
Well done , good explanation
Thanks! Glad you enjoyed the video 👍
Very good explanation thanks 👍
Glad it was helpful!
Always liked your videos mate 👍
Cheers!
Yes nice part two.
Glad you enjoyed the video 👍
Hello my friend. I didn't know before that I could need such a clamp in way to repair my cars (haven´t had till today injectors problems) . Now that I'm watching your video, I might buy this thing. Or not ? Anyway , decided to subscribe to your channel . Cheers
Great stuff 😍
Cheers!
Yo D. Thanks for the videos.
Excellent video, great explanation 👍🏻
Glad you enjoyed it John 👍
Great video well done
Thanks!
thank you for sharing !
Glad you enjoyed the video!
Excellent video. I subscribe. This is the right material for me. How to connect , what exspect to see and ...
👍👍👍
Great to hear! More to come. What else would you like to see on the channel? Thanks 👍
@@MechanicMindset
Diesel injectors all types.
Thank you for your response.
Cracking video, thank you.
Glad you enjoyed it 👍
great video thanks
Cheers, glad you enjoyed it 👍
hi you are the best i love watching you 👏👍
Thanks for links.:)
Hope they help!
Well done.
Ace mate ,just purchased a Uscope.
Awesome, that’s a cool little scope. So handy
Great work
Cheers!
thanks for video. Can you do one with direct injectors. i never seen any with DI engine.
Cheers! It’s on my list 👍
grazie utilissimo . attenuatore 20:1per cosa lo hai utilizzato ?
The injector voltage signal on channel B
Another Great video👍
Cheers George
Our PicoScope Training Is Now Live! www.mechanicmindset.com/diagnostic-coach
Hello, really interesting video and helping
but how can we explain the waveform of a piezoelectric injector from a diesel engine ? How issues are ploted in the actual waveform ?
From the video, you stated that the pintle hump on the current waveform means the injector pintle is open and the pintle hump in the voltage waveform means the injector pintle is closed. Do we need to use 2 channels when checking injectors?
To see these 2 events, they need to be checked with an amp clamp and a voltage probe. Separately. You could use one channel and do 2 measurements. But yes, this is 2 separate tests
Hey Darren,
Great follow on from the last voltage/injector video. There is so much that can be learned from both the voltage and current waveforms run in combination. This includes the MOSFET & diode or zener diodes inside the ECU used to 'clip' the flyback voltage, which helps control the injector close rate.
Well done on another brilliant video in the oscilloscope series!
MiracleMAX 😁
Great point, maybe something we can explore in a future video, thanks! 👍
Great video, would the pattern be the same for a solenoid diesel injector?
Hi, not the same but some similar properties
What's your opinion, using the 6 way universal breakout lead's ?
Is it good, by the mean, no back probing and make a damage to the loom?
Do we have better connection (and waveform) ?
They are quite useful. Couple things to be careful of from my own experience.
1. If you are looking for a fault, removing the connector might affect the issue
2. Always check they are ok before you test, I have used faulty test leads in the past.
Hi, Why do you use an atheunator when testing the voltage and current of the injector when the maximum input voltage of the oscilloscope is 20 volts?
Best regards
Hi, I only use the attenuator for the voltage signal (not the amp clamp). The spike goes up to about 120V. Sorry, I had the attenuator connected when I picked up the scope and didn’t make it clear it was for the voltage signal. I cover this on my last video, check it put if you haven’t already 👍
When the magnetic field collapses after the injector is turned off it induces a huge voltage spike that will fry a small scope like the 2204a. But it's a great scope, I use the same one all the time.
@@alanw5879 For sure, I discuss this in the first video before this 👍
@@MechanicMindset opps my bad, I did not see that video.
Hello. However, I bought a pico 2204a, i.e. with 1 \ 1 x 10 probes for trucks, the possibility of connecting 24v and a current clamp adapter may be useful. Hantek starter will probably be too weak? thanks for the help.
Are you referring to the Hantek amp clamp? I suppose it depends on what you need to measure.
@@MechanicMindset to the probe to measure 24v is probably a choke needed. and the tongs will be an expensive thing. inrush current about 2300 amps. unless the starting current is not measured, Hantek 650 may be enough?
Really like your videos. I want to lern more. Did you recomend the Pico 2204A to start with? Or is it easier for a beginner with a more expensive scope? More help functions etc?
Hi, glad you’re enjoying the channel. To be honest, to a beginner the 2204a and the most expensive 4425a would appear very similar. I think the 2204a is a great starter and you can always sell it if you decide to upgrade. All the accessories can be used on any other Pico too 👍
Excellent explanation!! Is the Amp clamp also a usefull tool to maessure injector dead time?
Glad you enjoyed the video. Sorry, can you clarify ‘dead time’? 👍
Just looked it up, yeah, amp clamp is the way to go I suppose for dead time 👍. Another good test for identifying sticky injectors
@@MechanicMindset Ordered the amp clamp today. Thanks for clarification!
@@frankspurfeld5073 No prob, great news!
What about the coils oscillations at the beginning of the amperage waveform, I see some vehicles have them and others don't. Is that something you look at?
Great point, I might have a play on the car and see how I can help to show this, maybe a part 3! 👍
@@MechanicMindset I was always taught that they're very significant as for addressing the coil/injector etc health. The start of building the magnetic field, technically the injector doesn't actually open until about half way up the ramp and after the injectors turned off there's still a small amount of fuel being delivered until the pintal is fully closed. Of course this happens in micro seconds. Just a thought, but I really do respect your videos. We're you using just a x20 attenuator for the voltage signal? I worry alot about damaging my scope (2204a) as well.
I forgot to ask, you don't use attenuators on your amp clamp correct? Cause you're only measuring the magnetic field and not tapped into the wire?
@@alanw5879 Haha, no; I already have the injector voltage signal connected on channel B when I presented the scope. A few people have asked that, I must be careful with that in future videos, could be misleading! 👍
Would we see similar waveforms on diesel injectors Darren? Great video as always 👍
Cheers! Yes a solenoid diesel injector is similar but might look quite different voltage wise. It also depends what type of diesel injector you are measuring; there are 3 main types used in the last 10 years that would all look very different to each other. Lots of questions on diesel so I will make a video soon 👍
@@MechanicMindset
yeah! I have a 6.6L DURAMAX LGH V8 Turbo (diesel) Direct Injection in a Chevrolet Express 4500 mini bus, (14,200lbs vehicle)... it has the super duper $400(ea.) injectors.
Will look for the video.
excellent. question: how would one interpret the slight short / initial vertica current spike that you explained toward the end? Is it indication of a failing/dying injector?
Yes, more than likely a short in the solenoid coil winding
Inductance in a coil is the property that resists a sudden change in current flow, effectively limiting initial current flow while the magnetic field is building. That's what causes the normal current ramp to be wedge shaped. Normally when a coil is shorted, the insulation at one spot has melted to the point that current can go through fewer loops of wire before it finds a direct pathway to ground. With fewer loops of wire, the inductance of the coil is reduced, so the current ramp is steeper, more closely resembling the way a normal resistive circuit behaves.
Check out the first video for the voltage check! ua-cam.com/video/F3n9YVbnaeA/v-deo.html
boss can tell us how to test bmw oxygen sensor if good or bad
Hi, I would start with the diagnostics. if you have an older oxygen sensor you can measure the signal voltage. The newer broadband oxygen sensors are more difficult to measure with a scope, you need a very sensitive amp clamp.
One video for NVH system diagnosing
Ok, will look in to it 👍
@@MechanicMindset thank you
Hi what is your oscilloscope pico 2205A opinion? Which one to choose 2205A or 2204D ?
Hi, I use 2204A, but if you want a bit more from a budget scope, go for 2405A, 4 channels and better specs 👍
@@MechanicMindset thank you. You are doing a great job 😉
Just a question, if you connect the ground to a chassis ground on one channel while measuring a lamp, and the ground elevates at 0,1V because of voltage drop, is the second Channel, where a battery powered ampclamp is connected going to show something wrong?
Current will flow across the ground through the scope; you must not do this with a common ground scope. We did a video on this 👍 You need floating grounds for that.
mind me asking where the AMP clamp is connected to?
Sure, amp clamp is connected to the oscilloscope via the BNC connector and I have clamped around the injector wire at the injector. Doesn’t matter which one 👍
@@MechanicMindset Thanks for the info! I was confused on which wire it was connected to haha!
@@pyrorenegade4983 No worries. In theory, you can connect an amp clamp anywhere on the circuit (I.e. live side, ground side, you could also put a loop at the fuse or relay and measure there)
@@MechanicMindset Noted! Thanks!
Can the CC-650 work as well? or is it the same tool?
Hi, the CC-650 is not so accurate for low current, I have a review video for that clamp where is try a coil 👍
Found you on mechanic lab scope Facebook had to sub good content keep it up you should look up bodget and legit on this his here in Ireland and does a lot with scopes
Cool, yes I know Leon; I was on a live stream with him last year. You can see it on the Cars Exposed channel 👍
More!
Check out the channel for more. Also check out our affordable training site for many more lesson videos www.mechanicmindset.com/diagnostic-coach
Lenz's law
That’ll be the one 👍
Зачем ставить делитель, если там и так супер низкое напряжение?)
It baffles me when you look inside the clamp there's not much there. Why make it so bulky. Not to mention the jaws can't clamp on some battery cables. Lmao
The tiny jaws are very limiting! I’ve never opened it up. I’m guessing at one point the space was needed and they never re designed the body. There are a few brands using the same body design