Engine Hesitates

Check fuel pressure.
Check EVAP control system.
Check for clogged fuel filter.
Check for contaminated fuel.
Check for clogged air filter.
Check for restricted exhaust system.
Check ignition and valve timing.
Check spark plugs.
Check for adequate spark with a spark tester.
Check for high resistance in spark plug wires (if equipped).
Check cooling system condition.
Check for low compression.
Check for vacuum leaks.
Check Throttle Position (TP) sensor.
Check for clogged MAP sensor vacuum hose.
Check for faulty PCM.
Check for faulty Engine Coolant Temperature (ECT) sensor.
Check for malfunctioning electronic fuel injection system.
Check for malfunctioning EGR valve.