Difficult to Start Engine When Cold

CHECK:

1. Engine Coolant Temperature Sensor
2. TDC/CKP/CYP Position Sensor
3. Manifold Absolute Pressure Sensor
4. Electronic Control (ECM) Unit [1]

NOTE: The system that could be the source of the symptom are listed and should be checked in order, starting with #1.

[1] Fuel with dirt, water, or a high percentage of alcohol is considered contaminated.