I have an f22a6 and just not to long ago i had a small knocking sound at higher rpm and only really under a load did i really hear it, took it up to tech and teacher told me that it sounds like spark knock and said to retard the ignition timing so i did, my dizzy was advanced all the way so i kicked it back center, now its starting to do it again so just to check i retarded it again and it went away again but my car runs slogish as He** anyone have any idea what this problem it
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