Engine Trouble Major loss of power

if ur asking if head and cylinder are separate yes . hopefully advance auto still rents them bcuz buying a tester is sadly a definite no go. and possibly dumb question if i do got a scratched cylinder (is that light scratches too or just actual gouges) and only real way to fix that is replace the cylinder im guessing right ?
 
you're correct, That could be the reason for loss of power.
 
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