Lack Of Power

On M/T models, ensure clutch is not slipping.
On A/T models, ensure transmission is not slipping.
Ensure brakes do not drag.
Ensure tire size and air pressure are to specification.
Check throttle linkage installation and operation.
Check operation of throttle body.
Check Camshaft Position (CMP) sensor.
Check Throttle Position (TP) sensor.
Check intake manifold vacuum. Vacuum should be more than 17.7 in. Hg at idle.
Disconnect injectors in turn and check for equal RPM drop between cylinders.
Check air filter element.
Check fuel system holding pressure.
Check that fuel pressure increases when abruptly accelerating.
Check Mass Airflow (MAF) sensor.
Check MAF sensor element for contamination.
Check spark plug condition.
Check spark plug wires.
Check ignition coil resistance.
Check engine compression.
Check for restricted exhaust system.
Check fuel filter.
Check for contaminated fuel.