Engine Surges

Check spark plugs.
Check for adequate spark with a spark tester.
Check for leaking or loose spark plug wires.
Check fuel pressure.
Check for clogged fuel filter.
Check for damaged or kinked fuel lines.
Check for vacuum leaks.
Check for cracked or burned distributor cap or rotor.
Check ignition and valve timing.
Check for faulty ECM.
Check for malfunctioning electronic fuel injection system.
Check for malfunctioning EGR valve.