Need help/advice

Ahem, What year?
-Adjustment issues; idle speed, timing,Bowl vent,
-Vacuum issues;EGR valve stuck open.PCV stuck open? Brake booster bad?Vacuum amp leaking. NOx valve bad?ETC.Wrong or bad gaskets? Open vacuum ports.
-Fuel issues;Missing check valve in acc.pump discharge circuit and plugged suction breaker.float level wrong.
-Mechanical issues; Bad intake valve(s) or valve lash.
-other; bad TC, Crankcase overfilled, plugged exhaust.