Insufficient Engine Power

Check fuel injectors.
Check fuel level.
Check for air inlet restriction.
Ensure fuel pressure is correct.
Check MAP sensor.
Check for restricted exhaust.
Check coolant temperature sensor.
Check air temperature sensor (if applicable).
Check TPS and connector (if applicable).
Check ignition and coil circuit.
Check MAP sensor (if applicable).
Check crankshaft position sensor.
Check intake and exhaust system.
Check EGR system.