Excellent video Sadel! This is another good way to test injector problems! Those adapter work pretty good, I use them a lot because we have a lot of customers complaining about noises! The pressure transducer is made by you or a brand name? Thanks a lot, Sadel and always learning from you brother!
The length of the measuring tube (as well as the distance of the injector and its proximity to the pressure transducer) affects in one way or another the accuracy of the measurements...
Not in a sealed, fluid filled, pressurized system. Test hose fills up and becomes part of the constant pressure, any changes anywhere in the system are equal across all of it. Hence why all the injector pressure drops are the same..... if it weren't true, then the injector furthest away from the fuel feed line of the rail would show a difference. That's why even on multibank engines they don't have independent fuel rails per bank with separate fuel feeds... They have rails on each bank but tie them in together and only feed on one side with one feed. Pressure is constant. If not the injector fuel flow and pressure drop from one end of an 8 cylinder one piece fuel rail system would look different from an injector on the totally opposite end 8 injectors away. This isn't like an incylinder measurement adding volume and lowering the compression on the cylinder you are in.
@@DTEAuto Another thank you for your contribution Sadel. Regarding the discussed matter it may be a yes and no . In a confined system according to Pascal's law the actual pressure drop/change will be the same within this system and shown as such by the pressure sensor. The chassis ear signal strength however will be affected by its external positioning/ location. On a side note: The injector pintle opening/hump can be found on the voltage trace as well. You would have to zoom in extremely on the portion where the injector is grounded. As the current flow rises the "ground voltage" rises as well and will show the same /shape/disruption during pintle movement as the current trace does. The current trace will be much cleaner though.
This is not a delay of pressure drop. If you use an amp clamp you will notice the point when the injector pintle opens. That is the point when the rail pressure begins to decrease.
it's a delay of fuel pressure drop from when the fuel injector was electrically "turned" on. Just like the delay of pintle movement on the closing side, it's after the point of electrically "turning" off the injector. Guess what would be delayed also....??? the pintle movement on the begging side as well, during the "turn on" point electrically. An amp clam will show the same thing correlating with the voltage trace. Amperage activity will occur at the same time the voltage shows the "turn on" point, the amp clamp doesn't "move" when the pintle moves, it moves as soon as voltage is commanded and the pintle moves delayed from that point and is seen in the voltage trace, amperage trace, and now noise trace to be delayed and it matches the fuel pressure drop being delayed from the turn on point. Fuel pressure can only drop from a leak, and that occurs from the pintle movement per injector, which again is displayed to be delayed as shown in the demonstration.
The rail is already full his transducer was at the end that’s why he was showing when the injector turned off and on. His synch was right on the injector itself and lined up perfectly that’s how you know it’s not the rail that’s showing.
Sadel knows this is not abnormal pressure drop delay. Sadel knows pintle opening can be seen in a current waveform. In this video he is simply demonstrating pintle opening and closing can also be seen using these other methods.
Another superbly detailed video, Sadel. Thanks for sharing! 👍🏼
Thanks again!
You need to be teaching classes at this point Sadel! Thanks for sharing!!!
Maybe one day!
Something I haven't see done before!
Wonderful video thanks for sharing
Glad you enjoyed it
Saludos desde paraguay bendiciones
Excellent video Sadel! This is another good way to test injector problems! Those adapter work pretty good, I use them a lot because we have a lot of customers complaining about noises! The pressure transducer is made by you or a brand name? Thanks a lot, Sadel and always learning from you brother!
Thank you, and the transducer is one I had made
Thank you.
You're welcome!
The length of the measuring tube (as well as the distance of the injector and its proximity to the pressure transducer) affects in one way or another the accuracy of the measurements...
Not in a sealed, fluid filled, pressurized system. Test hose fills up and becomes part of the constant pressure, any changes anywhere in the system are equal across all of it. Hence why all the injector pressure drops are the same..... if it weren't true, then the injector furthest away from the fuel feed line of the rail would show a difference. That's why even on multibank engines they don't have independent fuel rails per bank with separate fuel feeds... They have rails on each bank but tie them in together and only feed on one side with one feed. Pressure is constant. If not the injector fuel flow and pressure drop from one end of an 8 cylinder one piece fuel rail system would look different from an injector on the totally opposite end 8 injectors away. This isn't like an incylinder measurement adding volume and lowering the compression on the cylinder you are in.
@@DTEAuto Another thank you for your contribution Sadel.
Regarding the discussed matter it may be a yes and no .
In a confined system according to Pascal's law the actual pressure drop/change will be the same within this system and shown as such by the pressure sensor.
The chassis ear signal strength however will be affected by its external positioning/ location.
On a side note: The injector pintle opening/hump can be found on the voltage trace as well. You would have to zoom in extremely on the portion where the injector is grounded. As the current flow rises the "ground voltage" rises as well and will show the same /shape/disruption during pintle movement as the current trace does. The current trace will be much cleaner though.
NICE work man love your videos I always learn something from you thank you .question were can I buy dose noise test leads
You can contact me at DTEAuto@gmail.com
Great video.
Have you scoped the high-pressure rail sensor on GDI? Wander how a stuck open injector would show.
Спасибо
nice one , whats the product code for your noise bnc lead please , thanks again
I just refer to them as the BNC Adapters
@DTEAuto do you sell these or know of where to purchase from , thanks ,
What transducer is that? You have a cheap suggestion? Like a 100 or 200 dollar option to start out on
What type of pressure transducer are u using to read the fuel pressure
it's one I had made with custom psi range by a company years ago.
@DTEAuto ok thanks for ur reply
This is not a delay of pressure drop. If you use an amp clamp you will notice the point when the injector pintle opens. That is the point when the rail pressure begins to decrease.
it's a delay of fuel pressure drop from when the fuel injector was electrically "turned" on.
Just like the delay of pintle movement on the closing side, it's after the point of electrically "turning" off the injector.
Guess what would be delayed also....??? the pintle movement on the begging side as well, during the "turn on" point electrically. An amp clam will show the same thing correlating with the voltage trace. Amperage activity will occur at the same time the voltage shows the "turn on" point, the amp clamp doesn't "move" when the pintle moves, it moves as soon as voltage is commanded and the pintle moves delayed from that point and is seen in the voltage trace, amperage trace, and now noise trace to be delayed and it matches the fuel pressure drop being delayed from the turn on point. Fuel pressure can only drop from a leak, and that occurs from the pintle movement per injector, which again is displayed to be delayed as shown in the demonstration.
The rail is already full his transducer was at the end that’s why he was showing when the injector turned off and on. His synch was right on the injector itself and lined up perfectly that’s how you know it’s not the rail that’s showing.
Sadel knows this is not abnormal pressure drop delay. Sadel knows pintle opening can be seen in a current waveform. In this video he is simply demonstrating pintle opening and closing can also be seen using these other methods.
You always make a Mountain out of a ant hill, things aren't that complicated
Thank you for continuing to watch