engine

Hello! I know my question is probably stupid, but I just bought mazda 3(version is in the title) and I think there is something wrong with how the engine works now. When I bought it, it worked just fine, but now IT is louder and its shaking much more. Also i have noticed some vibration while...

I’m due to get my spark plugs replaced. I already have the new part but do i need anything else? Like Wires or coils ? Im new to this car stuff so anything helps. 2005 Mazda 3i 2.0L