-"My car is misfiring "

COP problems are very very common just replace them all with OEM only.

-"I'm so sick of this car having problems that's $475"

-"Does anyone know if these EBay ones work"

No you'll just have more problems

-"That's it I'm scraping this car"

*Posts picture of good condition low mileage car needing $400 of work being towed away*

part 1