2000 Corolla with Cylinder Misfire

#1
Alrighty, I was wondering if anyone had some advice. 2000 Corollas have the piston ring defect. My Corolla has a cylinder 3 misfire after replacement of a spark coil pack, a spark plug, and all four fuel injectors.

I put mystery oil in the engine last night, but it's still shaking. The check engine light blinks during acceleration. When I pull out the spark plugs, all of them look fine, except for the new one. It has carbon build up.

My father said that I may need to purchase a new engine and have it installed. He blames the defect. I could have the ring repaired, but then the others might go (more money).

My Corolla has 87,000 miles on it, and a mechanic said it would be worth the cost of repair to keep the car.

What should I do?
 
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