Pico 2204a: amzn.to/3G5etVs Kawish K102S: amzn.to/3W5h3Sj Mucar CDE900: amzn.to/3Z6qKl9 Godiag Breakout Box: amzn.to/3iX99eI Amazon Storefront: www.amazon.com/shop/katzenpapa Want to help?: paypal.me/chesszero

Thanks for the mention! You can also connect a single channel and place both leads on the injector control wires, instead of battery ground, and this will give you the math channel waveform you showed, live. Why, because it is the difference in potential, (A-B). Make sense? This injector waveform is very very similar to the old TBI injection Peak and Hold designs where you will have two voltage spikes. One at the end of the peak section and the second at the end of the hold. Thanks again!

@oneanddonediy

Жыл бұрын

No problem for the mention! Thanks for giving me this new method for testing the injectors, and yes it makes perfect sense. I'll definitely be trying this soon, hopefully this weekend. Have a good one and thanks for dropping by!

@ScannerDanner

Жыл бұрын

@@oneanddonediy The Pico math channels are awesome! And what you showed too. The other method I mentioned is how I would do it on my Snap-on scope as it does not do math channels. Or how one would do this test using a single channel scope.

@oneanddonediy

Жыл бұрын

Ah, thanks for clarifying that, especially for the folks that have a Snap-on. Thanks for passing on this knowledge, much appreciated from North Carolina!

Yo Chris, Wow, this is very sophisticated stuff. Good job. -Chuck

@katzenpapa

Жыл бұрын

I'm learning! This scope thing is right up my alley, being that I am a scientist by trade. You will definately see this thing a lot on this channel! Cheers and happy New Year Chuck!

@oneanddonediy

Жыл бұрын

Thanks Check! Happy New year!

This is great to have a channel that starts at the beginning of the trade. I subscribe to Scanner Danner, South main auto, eric the car guy, Pine hollow diagnostics and many more but can't wait to see what's coming from you next! Keep up the good work and you know you're doing something right if you're on Danners radar.

@oneanddonediy

Жыл бұрын

Thanks for stopping by. I hope to offer some balance insights into learning new things about automotive as I really enjoy it. I watch all of those channels too, big shout to all of them for helping us out!

as a fellow DIY and KZreadr, I want to wish you well with your new channel

@oneanddonediy

Жыл бұрын

Thanks so much, and I hope your channel continues to grow!

Fascinating...using a math channel to analyze them. Interesting video for sure, I think it's like anything else, the more known goods we analyze, the easier it is for us to see bad my friend 😉 Keep up the great work 👍 👏

@katzenpapa

Жыл бұрын

Yes, this was a very interesting exercise for me. I am a scientist by trade and automotive is one of my hobbies, so I am use to looking at HPLC and capillary electrophoresis chromatograms so this was a great experience for me! Thanks, and you kepp up the good work as well!

@PaulysAuto

Жыл бұрын

@@katzenpapa When somebody who understands you meets you; well. .you're completely satisfied😁

Nce setup! A Fuse buddy lets you measure amps at any fuse location.

@oneanddonediy

14 күн бұрын

Thanks for the tip!

Thanks for the video :)

@oneanddonediy

8 ай бұрын

No problem!!

Thanks you .

@oneanddonediy

Жыл бұрын

Glad my video helped you!

If you compare the port vs GDI, the main difference is how the ECU manages the the coil current. In GDI it is just the coil resistance and battery voltage what dictates the current. That means the coil has to have quite a lot of turns to not overheat, but that means it has limited forces and/or will be rather slow (high inductance with limited battery voltage) to respond. On GDI the injectors have to operate with greater forces and stricter timing, so the simple one side controlled electromagnet won't make it. You can see first high voltage pulse (to a voltage level that would be tightly regulated by the ECU), which allows very fast magnetic field ramp up, so very fast response on even a high inductance coil. Plus it allows a high current boost to get the injector needle actually moving. Then you can see the driver is pulsing battery voltage. That is the way, how it maintains the exact, lower (as at this moment it needs only to hold the needle in the open position, aka holding current), current in very efficient way even when the coil resistance is low (so allows for fast responding low inductance coil design) and even it is able to compensate for batter voltage variation. And then the negative side switch get released, allowing the holding current to disappear quickly for the needle to close. All this allows for way higher force injectors while keeping them small to maintain the timing accuracy, yet do not overheat them.

@oneanddonediy

Жыл бұрын

Thank you so much for taking your time to explain that. It really helps a lot, especially to see this explanation and actually have the waveform live on the screen. I'm a trained scientist and, the more I learn about cars it just fascinates me the amount of science and engineering that has gone into making parts. I know cars give people trouble and they do need to be fixed from time to time. However, it's still amazes me the effort that was put into this.

👍

for us poor techs that can't afford that fancy pico scope wouldn't it be the same to plug the negative of the scope into the ground side of the injector circuit and the positive into the positive side of the circuit(or wold it be the other way around) and get the same out put? no all GDI injector wave forms look like this or was this unique to the GM style

@oneanddonediy

Жыл бұрын

You're probably right on getting the same output. I would have to check that out. As far as just being unique too GM. I'm not sure about that either, but what I can say is that some people may be only pro one side of the injector instead of both. I prove both to make a math channel to get the end result that you see in the video.

What software are you running? I bought the 2204a, but picoscope 7 wont work on my mac and the automotive scope wont recognize the 2204a. Says it is unsupported.

@oneanddonediy

Жыл бұрын

You have to use Picoscope 7 on picotech.com not the automotive version on picoauto.com

@type3sqr

Жыл бұрын

@@oneanddonediy i appreciate the reply, but for some reason, I can install it, but it wont open.

@oneanddonediy

Жыл бұрын

Right click the icon and try to run it as an administrator.

@type3sqr

Жыл бұрын

@@oneanddonediy I’ll give that a shot

@oneanddonediy

Жыл бұрын

Hope it works out for you!