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Traded it in on a 2023 3.5 Ecoboost. Fingers crossed no issues now. Thank you for all the replies.

10/20/23 UPDATE: Got the new computer in and replaced the old one. Didn't help a thing. Engine light comes back on, but is now throwing out different codes than before. The Service Manager, himself is working on it. Said they re-programmed all they know to reprogram and nothing is helping...

Second dealership I took it to, finally found where a ground wire/cable had been mounted to where it ran across the other two wires. I can't remember what those wires went to. First dealership did not find that and did something else to try and fix the issue. The previous owner had the same...

WELL, Latest Update: Service Manager thought they had the issue fixed by reprogramming Everything. He drove it home, last night. About a 35 mile trip, one way. Got in it this morning and guess what..... Engine light came on and cylinder deactivation happened on and off all the way back. He...

Yes Sir. Communicating with Mr. Jesse right now. THANK YOU SO MUCH. Not sure if I want to jump off a bridge, or just make the truck go off a bridge, at this point.

Previous issue had something shortening out the coils. Turned out they found a ground wire had been mounted to where it laid across two other wires at the top of the motor. The ground wire had rubbed the insulation off of them. When the engine "torqued", it caused those wires to cause the coil...

Brand new member here, so hope this post is ok: 2021 5.0 V8.. Ok. Had my truck in the shop for the past two weeks. Just picked it up today. Drove home and then to the grocery store and IT IS HAPPENING AGAIN!!! Engine Light came right back on. Went by the local Auto Parts store and the...