Hard Start

Checks	Action
DEFINITION: Engine cranks OK, but does not start for a long time. Does eventually run, or may start but immediately dies.
Preliminary	Perform the Diagnostic System Check - Engine Controls .
Sensor/System	A variety of sensor or physical conditions may result in a hard start condition without setting a diagnostic trouble code (DTC). In order to determine if any of these conditions exist, perform the following actions: Compare scan tool data to a known good vehicle or refer to Scan Tool Data List . Inspect for a restricted exhaust. Refer to Restricted Exhaust in Engine Exhaust.
Fuel System	A variety of fuel system conditions may result in a hard start condition without setting a DTC. In order to determine if any of these conditions exist, perform the following actions: Refer to Alcohol/Contaminants-in-Fuel Diagnosis (With Special Tool) or Alcohol/Contaminants-in-Fuel Diagnosis (Without Special Tool) . Refer to Fuel System Diagnosis .
Ignition System	A variety of ignition system conditions may result in a hard start condition without setting a DTC. In order to determine if any of these conditions exist. Refer to Electronic Ignition (EI) System Diagnosis .
Engine Mechanical	A variety of engine mechanical conditions may result in a hard start condition without setting a DTC. In order to determine if any of these conditions exist. Refer to Engine Compression Test in Engine Mechanical-3.8L. If incorrect compression is detected, inspect the following items: Carbon build-up Cam timing Oil fouling Incorrect parts Bent pushrods, refer to Valve Rocker Arm and Push Rods Cleaning and Inspection in Engine Mechanical-3.8L Rocker arms, refer to Valve Rocker Arm and Push Rods Cleaning and Inspection in Engine Mechanical-3.8L Valve springs, refer to Cylinder Head Cleaning and Inspection in Engine Mechanical-3.8L Cam lobes Intake/exhaust manifold flashing Head gaskets, refer to Cylinder Head Cleaning and Inspection in Engine Mechanical-3.8L