You are so helpful! I've been racking my brain trying to figure out what's wrong with my lincoln mks ecoboost. I got it cheap and work on my own stuff. 3 mechanics before I got it tried to figure it out and I figured I'd find the problem. MY head was too big to realize I was in over my head. But your video enlightened me to investigate the electronics. Wish you were local I'd take it to you for help. Wish me luck!
I assume my issue is the ECM, as I replaced the coil, code remains and I can smell “electrical overload” on the new coil. But what diagnostic tool confirms?
You said the problem was on the 5V reference circuit, that would require a 3 plug connector at the coil wouldn't it? 1 for coil control 1 for 5V reference and 1 for 12V. The MKZ I have here in the shop now only has 2 wires to the coil. 1 for control and 1 for 12V.
I have a hard time taking seriously an expert who thinks an MKZ and a Taurus are the same car. They are NOT, they are different platforms. MKZ=Fusion. MKS=Taurus. These are Ford's D3 Platform Cars MKZ & Fusion = 3.5NA. These are CD3 Platform cars, a platform designed by Mazda and adopted by Ford during their Mazda ownership. MKS & Taurus = 3.5 Ecoboost or 3.7NA. Another shop telling the shadetree mechanic that cars are too complicated to fix without an expert. Why didn't they show us the code? 50/50 their diagnosis on the computer being bad is complete BS and just a way to charge for a far more expensive part. $800 for the ecu as opposed to a $50 coil. Why not show us the code? Im not conviced the cars computer can distinguish between a bad coil and a bad ecu due to a bad coil. Ohh and it can cause a fire..... dont forget to warn us how dangerous it can be and the consequences of working on our own cars....