10 Minute Diagnostic Ford Edge Misfire

[@frankyv5999]

great short case study. keep them coming.

[@billyyoder8171]

Thank you Rick. Good job. Have a blessed and safe week to you and your family.

[@codysautodiagnosticsprogra8706]

I like these short case studies. Good work Rick

[@autorepairbymike1356]

I still found a few areas that were new to me regardless of the simplicity of the diag. Thanks for sharing.

[@jgeorges3061]

Rick, Awesome case studies thanks for sharing brotha.

[@mikeantee2733]

Looking forward to more.

[@reubenrice9458]

Question here. Why would we not want to go back to the ECM and make sure the wire integrity on the ground control side for the coil is good the whole way back to the ECM, by measuring at the ECM and getting the 12 V that is passing through the coil pack and making it to the ECM what test the integrity of the wire and if we did not have ground control coming out. Then that would condemn the ECM.

[@diagnosticsbyrick7688]

There is nothing wrong with that and it would get you a little closer to that 100% certainty. If I did not have the information of a melted coil, then I definitely would have done this. But considering I did have that information I didn't see the need to go any further because the likelihood was very small that the ignition coil either damaged the wiring somewhere in the harness or the wire somehow broke immediately after the coil failed. I did unplug the PCM and made sure the connector was not melted but didn't think it necessary to disassemble the connector to backprobe the circuit. It's not that it was a difficult test to do, but I'd rather not disturb a PCM connector with a backprobe if its not necessary. Had I shown up to a misfire and had not seen the bad coil with my own eyes, or if i was told another shop had replaced the coils because one was melted....well then I would feel that is a little too much hearsay and I would probably want to go that extra step. But in this case I just thought it wasn't necessary. That being said, I should probably keep these things in mind when getting data for case studies and not for Flat Rate :)

[@alexandriabowe]

Thanks for the share

[@peterhamilton2715]

Thanks Rick. A video on scan tool pid selection to address the most common codes within the 10 minute time frame would be appreciated .

[@diagnosticsbyrick7688]

@@peterhamilton2715 That is one of the things on my todo list. I have a lot of videos and different playlist topics planned.

[@david619dc]

Love it

[@abbydavis352]

What if the wire was broken between coil and pcm?

[@diagnosticsbyrick7688]

If the control circuit was broken between the PCM and coil then the scope pattern would be the same. But in this case we had a known of a melted ignition coil. So that would mean that the coil went bad and a wire broken simultaneously. Since that is a highly unlikely scenario I did not chase it. One day I will do a video called "just one more test". I can almost always come up with another possible cause, even though that cause may be very unlikely and borderline impossible....there is almost always another cause theoretically possible. The question is this "At what point do you stop testing and make the call". its all about the amount of time needed to verify the next possibility vs the likelihood that it is a real possibility.