"Ignition system, fuel supply system, MAP sensor, IAC valve, contaminated fuel, lack of fuel, fuel injector, fuel injector circuit, low compression, valve clearance"

getting this cel after i installed my vafc hack. could this be caused by rich/lean conditions and/or bad spark plugs. I've been a total idiot and haven't changed my spark plugs in like 9k miles. Just wondering what could be causing a missfire.