Engine Misfires Or Has Lack Of Power

Check ignition and valve timing.
Check spark plugs.
Check cooling system.
Check for dirty or clogged fuel filter.
Check for low compression.
Check for clogged air filter.
Check for vacuum leaks.
Check for worn distributor terminals.
Check for contaminated fuel.
Check for malfunctioning distributor mechanical or vacuum advance (if equipped).
Check for malfunctioning electronic fuel injection system.
Check for malfunctioning EGR valve (if equipped).
Ensure sufficient secondary spark is available.