Fuel Injected

Ensure that idle speed is correct.
Ensure air intake system is unrestricted.
Ensure fuel system pressure is correct. Use ohmmeter to verify correct fuel injector resistance.
Check canister purge control valve operation.
Ensure engine has sufficient compression.
Ensure correct throttle position sensor adjustment and resistance value.
Check operation of coolant temperature sensor.
Check for excessive timing retard due to high level of carbon build-up.
Check EGR valve and solenoid for correct operation.
Check for poor quality or contaminated fuel. Check for use of fuel with high alcohol content.
Ensure spark plug application is correct.
Ensure exhaust system is unrestricted.
Verify brakes are not dragging.