IDon't Want To Completely Derail But I'm Having This Exact same Issue On A Friends 93With Factory Turbo. Engine Was Originally Pulled Because Of assumed Rod Knock By Someone Else. I Rebuilt The Engine And Put It BackAll Back TogetherAnd It Still Knocks. I Do Have A Hard Start Issue Even On Hot Day For The First Time Starting It. Should I Try To Advance Or Retard The Timing.