Update: Video breakdown after taking the test. The first 2 minutes are general ignition knowledge that you should already know. At 2:00 I start focusing on how to diagnose a misfire. I saw at least 5 questions that were misfire related, resulting from the ignition system or fuel system. I did not make any fuel system videos, but you should be able to easily figure it out. More on this below. As for ignition system related misfires, the questions were pretty basic in this area. Is an ignition [coil-on-plug] going to cause a misfire on 1 cylinder, or multiple? Many of the questions were in wiring diagram format. Look at the wiring diagram shown at 4:49. Let's focus on that first coil-on-plug, on the very left. Let's say it was not producing spark. B+ voltage is shown on the power side to the connector and the ground is good, what's the most likely cause of the no spark? As for the fuel system, if 1 injector on GDI is clogged, is it going to cause a misfire on 1 cylinder or many? If fuel pump pressure is low, is it going to affect 1 cylinder or many? See easy to figure out. Also focus on interpreting injector power balance results. The tests done to the coil starting at 3:50 are good to know, also know how to test the coil for carbon tracking.
For the COP question would the answer for the no spark condition have to do with faulty spark plugs? 1 injector clogged on GDI would be a misfire on only 1 cylinder, right?
@@charlietoognarly The most likely answer would be a bad coil. In the question the point was made that the circuit is working as intended. Usually when you check for spark, you remove the coil and connect it to an ignition spark tester, so the spark plug is not even tested. Yes, a faulty spark plug can also cause a no spark, causes could be: the ground electrode could be missing, incorrect gap, or it can be internally broken. You can check the resistance of the spark plug ( shown at 3:08 ) to verify its not internally broken. YES 1 injector clogged on GDI misfires on 1 cylinder.
Update: Video breakdown after taking the test. The first 2 minutes are general ignition knowledge that you should already know. At 2:00 I start focusing on how to diagnose a misfire. I saw at least 5 questions that were misfire related, resulting from the ignition system or fuel system. I did not make any fuel system videos, but you should be able to easily figure it out. More on this below.
As for ignition system related misfires, the questions were pretty basic in this area. Is an ignition [coil-on-plug] going to cause a misfire on 1 cylinder, or multiple? Many of the questions were in wiring diagram format. Look at the wiring diagram shown at 4:49. Let's focus on that first coil-on-plug, on the very left. Let's say it was not producing spark. B+ voltage is shown on the power side to the connector and the ground is good, what's the most likely cause of the no spark?
As for the fuel system, if 1 injector on GDI is clogged, is it going to cause a misfire on 1 cylinder or many? If fuel pump pressure is low, is it going to affect 1 cylinder or many? See easy to figure out. Also focus on interpreting injector power balance results.
The tests done to the coil starting at 3:50 are good to know, also know how to test the coil for carbon tracking.
For the COP question would the answer for the no spark condition have to do with faulty spark plugs?
1 injector clogged on GDI would be a misfire on only 1 cylinder, right?
@@charlietoognarly The most likely answer would be a bad coil. In the question the point was made that the circuit is working as intended. Usually when you check for spark, you remove the coil and connect it to an ignition spark tester, so the spark plug is not even tested. Yes, a faulty spark plug can also cause a no spark, causes could be: the ground electrode could be missing, incorrect gap, or it can be internally broken. You can check the resistance of the spark plug ( shown at 3:08 ) to verify its not internally broken.
YES 1 injector clogged on GDI misfires on 1 cylinder.
Mannnn these videos are a life saver. You’ve helped me pass so many test. Hats off brother !!
Your videos are concise and informative