Will not start, Changed CAM phasers, timing chains, tensioners, guides, spark plugs

Figured it out. It was the crankshaft position sensor connector, so I went and got a new pigtail, spliced the wires, and boom. It started right up.

I totally forgot to put RTV on the timing cover. Should I take everything off and take the cover off and out RTV? Also, should it be on the valve covers too? And should I also change the cam position sensors?

A costly mistake because that means I must drain everything again and fight to remove the valve covers and harmonic balancer to get the timing cover off. What a bummer. Another thing, the chain wasn’t off at all, but the engine is shaking really bad. What could that be? The marks lined up, but I had to move the cams and they did jump when I moved them because of the valve spring pressure or whatever it is. Is that bad?

Should this be flush? Could that be why it’s shaking?

So, forget those last posts lol because I took it apart again fearing it was off a tooth and that’s why it was shaking and sure enough the right-hand chain has slack. Why is that? What did I do wrong? All the black links lined up perfectly.

I took it apart and it turns out the pulley is fine because there’s like a little ring on the water pump that’s rusted to the same color as the fan clutch, so it makes it look like it’s not flush, but it is. Also, I had a moment of exhaustion because the chain wasn’t loose. It had gotten a little slack because when I was taking the balancer bolt off it moved back very slightly so that was why there was slack, lol. Everything I did was fine, and it was still in time. Tensioners are new. Phasers oil pump gaskets chains and guided all new. Along with spark plugs VVT solenoids cam sensors crank sensor and crank connector so the only thing I can think of is maybe some debris got into the spark plug holes. I noticed the fuel injector retaining clip was bent. Could that cause the vibration?

No.

Although I did smell fuel in the cabin for a like a minute, then it went away.

All of the injectors have retaining clips on them but two of them were bent and fuel was leaking out. And yes, I’ll take a video when I start it. Right now, I’m charging the battery because the interior lights won’t even turn on. That's how dead it is which I don’t understand because I disconnected the negative cable when I was working on the car.

Um, heard a really loud pop and then found this.

The plug itself looks fine to me, but here’s what broke.

Crazy.

The plug wasn’t broken at all but no it wasn’t in the head. Threads back in perfectly and tightens and everything. I’m pretty sure it was the ignition coil because that would explain a lot of the stuff the owner of the car was telling me he was experiencing.